1525481568 has 144 divisors (see below), whose sum is σ = 4729037040. Its totient is φ = 463629312.

The previous prime is 1525481567. The next prime is 1525481569. The reversal of 1525481568 is 8651845251.

1525481568 is a `hidden beast` number, since 1 + 5 + 2 + 5 + 4 + 81 + 568 = 666.

It is an interprime number because it is at equal distance from previous prime (1525481567) and next prime (1525481569).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525481567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308298 + ... + 313206.

It is an arithmetic number, because the mean of its divisors is an integer number (32840535).

Almost surely, 2^1525481568 is an apocalyptic number.

1525481568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525481568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364518520).

1525481568 is an abundant number, since it is smaller than the sum of its proper divisors (3203555472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525481568 is a wasteful number, since it uses less digits than its factorization.

1525481568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021 (or 5010 counting only the distinct ones).

The product of its digits is 384000, while the sum is 45.

The square root of 1525481568 is about 39057.4137392634. The cubic root of 1525481568 is about 1151.1599054508.

The spelling of 1525481568 in words is "one billion, five hundred twenty-five million, four hundred eighty-one thousand, five hundred sixty-eight".