1625165631 has 12 divisors (see below), whose sum is σ = 2356390608. Its totient is φ = 1079322624.

The previous prime is 1625165611. The next prime is 1625165681. The reversal of 1625165631 is 1365615261.

1625165631 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 16 + 5 + 631 = 666.

It is not a de Polignac number, because 1625165631 - 2⁶ = 1625165567 is a prime.

It is a super-2 number, since 2×1625165631² = 5282326656367256322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625165611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340930 + ... + 345663.

It is an arithmetic number, because the mean of its divisors is an integer number (196365884).

Almost surely, 2^1625165631 is an apocalyptic number.

1625165631 is a deficient number, since it is larger than the sum of its proper divisors (731224977).

1625165631 is a wasteful number, since it uses less digits than its factorization.

1625165631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686862 (or 686859 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1625165631 is about 40313.3430888583. The cubic root of 1625165631 is about 1175.7072864947.

The spelling of 1625165631 in words is "one billion, six hundred twenty-five million, one hundred sixty-five thousand, six hundred thirty-one".