625256479647720 has 80 divisors (see below), whose sum is σ = 2101556501049060. Its totient is φ = 166735061238528.

The previous prime is 625256479647623. The next prime is 625256479647827. The reversal of 625256479647720 is 27746974652526.

625256479647720 is a `hidden beast` number, since 6 + 2 + 5 + 2 + 5 + 6 + 47 + 96 + 477 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 613784670003684 + 11471809644036 = 24774678^2 + 3387006^2 .

It is a super-3 number, since 3×625256479647720³ (a number of 45 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 96490194237 + ... + 96490200716.

Almost surely, 2^{625256479647720} is an apocalyptic number.

625256479647720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

625256479647720 is an abundant number, since it is smaller than the sum of its proper divisors (1476300021401340).

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

625256479647720 is a wasteful number, since it uses less digits than its factorization.

625256479647720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192980394976 (or 192980394963 counting only the distinct ones).

The product of its (nonzero) digits is 2133734400, while the sum is 72.

The spelling of 625256479647720 in words is "six hundred twenty-five trillion, two hundred fifty-six billion, four hundred seventy-nine million, six hundred forty-seven thousand, seven hundred twenty".