625631375825 has 12 divisors (see below), whose sum is σ = 775821653388. Its totient is φ = 500480102400.

The previous prime is 625631375821. The next prime is 625631375827. The reversal of 625631375825 is 528573136526.

It can be written as a sum of positive squares in 6 ways, for example, as 97643125441 + 527988250384 = 312479^2 + 726628^2 .

It is not a de Polignac number, because 625631375825 - 2² = 625631375821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625631375821) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 105956 + ... + 1123605.

It is an arithmetic number, because the mean of its divisors is an integer number (64651804449).

Almost surely, 2^625631375825 is an apocalyptic number.

It is an amenable number.

625631375825 is a deficient number, since it is larger than the sum of its proper divisors (150190277563).

625631375825 is a wasteful number, since it uses less digits than its factorization.

625631375825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249924 (or 1249919 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 53.

The spelling of 625631375825 in words is "six hundred twenty-five billion, six hundred thirty-one million, three hundred seventy-five thousand, eight hundred twenty-five".