1625911434 has 96 divisors (see below), whose sum is σ = 4424385600. Its totient is φ = 440082720.

The previous prime is 1625911411. The next prime is 1625911487. The reversal of 1625911434 is 4341195261.

It is a happy number.

1625911434 is a `hidden beast` number, since 1 + 62 + 591 + 1 + 4 + 3 + 4 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 34104 + ... + 66444.

It is an arithmetic number, because the mean of its divisors is an integer number (46087350).

Almost surely, 2^1625911434 is an apocalyptic number.

1625911434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625911434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212192800).

1625911434 is an abundant number, since it is smaller than the sum of its proper divisors (2798474166).

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

1625911434 is a wasteful number, since it uses less digits than its factorization.

1625911434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32385 (or 32372 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1625911434 is about 40322.5921041790. The cubic root of 1625911434 is about 1175.8871065098.

It can be divided in two parts, 162591 and 1434, that added together give a square (164025 = 405²).

The spelling of 1625911434 in words is "one billion, six hundred twenty-five million, nine hundred eleven thousand, four hundred thirty-four".