3957992185896 has 96 divisors (see below), whose sum is σ = 12254434920000. Its totient is φ = 1130531212800.

The previous prime is 3957992185859. The next prime is 3957992185907. The reversal of 3957992185896 is 6985812997593.

3957992185896 is a `hidden beast` number, since 3 + 9 + 5 + 7 + 9 + 9 + 21 + 8 + 589 + 6 = 666.

It is a super-2 number, since 2×3957992185896² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 641296 + ... + 2885696.

It is an arithmetic number, because the mean of its divisors is an integer number (127650363750).

Almost surely, 2^{3957992185896} is an apocalyptic number.

3957992185896 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3957992185896 is an abundant number, since it is smaller than the sum of its proper divisors (8296442734104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3957992185896 is a wasteful number, since it uses less digits than its factorization.

3957992185896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247919 (or 2247912 counting only the distinct ones).

The product of its digits is 2645395200, while the sum is 81.

The spelling of 3957992185896 in words is "three trillion, nine hundred fifty-seven billion, nine hundred ninety-two million, one hundred eighty-five thousand, eight hundred ninety-six".