625138193825 has 24 divisors (see below), whose sum is σ = 777212755200. Its totient is φ = 498794682560.

The previous prime is 625138193821. The next prime is 625138193843. The reversal of 625138193825 is 528391831526.

It is not a de Polignac number, because 625138193825 - 2² = 625138193821 is a prime.

It is a super-2 number, since 2×625138193825² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (625138193821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23613446 + ... + 23639904.

It is an arithmetic number, because the mean of its divisors is an integer number (32383864800).

Almost surely, 2^625138193825 is an apocalyptic number.

It is an amenable number.

625138193825 is a deficient number, since it is larger than the sum of its proper divisors (152074561375).

625138193825 is a wasteful number, since it uses less digits than its factorization.

625138193825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28921 (or 28916 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 53.

The spelling of 625138193825 in words is "six hundred twenty-five billion, one hundred thirty-eight million, one hundred ninety-three thousand, eight hundred twenty-five".