3957868884915 has 48 divisors (see below), whose sum is σ = 7484608591200. Its totient is φ = 1918803056640.

The previous prime is 3957868884911. The next prime is 3957868884923. The reversal of 3957868884915 is 5194888687593.

3957868884915 is a `hidden beast` number, since 39 + 578 + 6 + 8 + 8 + 8 + 4 + 9 + 1 + 5 = 666.

It is not a de Polignac number, because 3957868884915 - 2² = 3957868884911 is a prime.

It is a super-2 number, since 2×3957868884915² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3957868884911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5571811 + ... + 6241859.

It is an arithmetic number, because the mean of its divisors is an integer number (155929345650).

Almost surely, 2^{3957868884915} is an apocalyptic number.

3957868884915 is a deficient number, since it is larger than the sum of its proper divisors (3526739706285).

3957868884915 is a wasteful number, since it uses less digits than its factorization.

3957868884915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682004 (or 682001 counting only the distinct ones).

The product of its digits is 4180377600, while the sum is 81.

The spelling of 3957868884915 in words is "three trillion, nine hundred fifty-seven billion, eight hundred sixty-eight million, eight hundred eighty-four thousand, nine hundred fifteen".