625696091904 has 288 divisors, whose sum is σ = 1807942397184. Its totient is φ = 190964367360.

The previous prime is 625696091897. The next prime is 625696091987. The reversal of 625696091904 is 409190696526.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1065921499 + ... + 1065922085.

It is an arithmetic number, because the mean of its divisors is an integer number (6277577768).

Almost surely, 2^625696091904 is an apocalyptic number.

625696091904 is a gapful number since it is divisible by the number (64) 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 625696091904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903971198592).

625696091904 is an abundant number, since it is smaller than the sum of its proper divisors (1182246305280).

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

625696091904 is a wasteful number, since it uses less digits than its factorization.

625696091904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 57.

The spelling of 625696091904 in words is "six hundred twenty-five billion, six hundred ninety-six million, ninety-one thousand, nine hundred four".