3957695865 has 48 divisors (see below), whose sum is σ = 7029255168. Its totient is φ = 2058995328.

The previous prime is 3957695851. The next prime is 3957695891. The reversal of 3957695865 is 5685967593.

3957695865 is a `hidden beast` number, since 3 + 9 + 576 + 9 + 58 + 6 + 5 = 666.

It is not a de Polignac number, because 3957695865 - 2⁴ = 3957695849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 667504 + ... + 673406.

It is an arithmetic number, because the mean of its divisors is an integer number (146442816).

Almost surely, 2^3957695865 is an apocalyptic number.

It is an amenable number.

3957695865 is a deficient number, since it is larger than the sum of its proper divisors (3071559303).

3957695865 is a wasteful number, since it uses less digits than its factorization.

3957695865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278 (or 6275 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 63.

The square root of 3957695865 is about 62910.2206720021. The cubic root of 3957695865 is about 1581.7850712226.

The spelling of 3957695865 in words is "three billion, nine hundred fifty-seven million, six hundred ninety-five thousand, eight hundred sixty-five".