1551501664 has 24 divisors (see below), whose sum is σ = 3129022008. Its totient is φ = 756829440.

The previous prime is 1551501661. The next prime is 1551501673. The reversal of 1551501664 is 4661051551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551501661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589962 + ... + 592585.

It is an arithmetic number, because the mean of its divisors is an integer number (130375917).

Almost surely, 2^1551501664 is an apocalyptic number.

It is an amenable number.

1551501664 is an abundant number, since it is smaller than the sum of its proper divisors (1577520344).

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

1551501664 is a wasteful number, since it uses less digits than its factorization.

1551501664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182598 (or 1182590 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1551501664 is about 39389.1059050596. The cubic root of 1551501664 is about 1157.6681415869.

The spelling of 1551501664 in words is "one billion, five hundred fifty-one million, five hundred one thousand, six hundred sixty-four".