625831656960 has 640 divisors, whose sum is σ = 2170082534400. Its totient is φ = 153283461120.

The previous prime is 625831656871. The next prime is 625831656973. The reversal of 625831656960 is 69656138526.

It is a tau number, because it is divible by the number of its divisors (640).

It is a self number, because there is not a number n which added to its sum of digits gives 625831656960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1425584421 + ... + 1425584859.

It is an arithmetic number, because the mean of its divisors is an integer number (3390753960).

Almost surely, 2^625831656960 is an apocalyptic number.

625831656960 is a gapful number since it is divisible by the number (60) 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 625831656960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085041267200).

625831656960 is an abundant number, since it is smaller than the sum of its proper divisors (1544250877440).

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

625831656960 is a wasteful number, since it uses less digits than its factorization.

625831656960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 57.

The spelling of 625831656960 in words is "six hundred twenty-five billion, eight hundred thirty-one million, six hundred fifty-six thousand, nine hundred sixty".