625381878125 has 12 divisors (see below), whose sum is σ = 781677321012. Its totient is φ = 500305500000.

The previous prime is 625381878089. The next prime is 625381878133. The reversal of 625381878125 is 521878183526.

625381878125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 602593560361 + 22788317764 = 776269^2 + 150958^2 .

It is not a de Polignac number, because 625381878125 - 2³⁴ = 608202008941 is a prime.

It is a super-2 number, since 2×625381878125² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100057976 + ... + 100064225.

It is an arithmetic number, because the mean of its divisors is an integer number (65139776751).

Almost surely, 2^625381878125 is an apocalyptic number.

It is an amenable number.

625381878125 is a deficient number, since it is larger than the sum of its proper divisors (156295442887).

625381878125 is an frugal number, since it uses more digits than its factorization.

625381878125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200122226 (or 200122206 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 56.

The spelling of 625381878125 in words is "six hundred twenty-five billion, three hundred eighty-one million, eight hundred seventy-eight thousand, one hundred twenty-five".