13977161856 has 96 divisors (see below), whose sum is σ = 45966585600. Its totient is φ = 3993472512.

The previous prime is 13977161851. The next prime is 13977161873. The reversal of 13977161856 is 65816177931.

13977161856 is a `hidden beast` number, since 1 + 397 + 71 + 6 + 185 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×13977161856² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13977161851) 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, 858576 + ... + 874703.

It is an arithmetic number, because the mean of its divisors is an integer number (478818600).

Almost surely, 2^13977161856 is an apocalyptic number.

13977161856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13977161856 is an abundant number, since it is smaller than the sum of its proper divisors (31989423744).

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

13977161856 is a wasteful number, since it uses less digits than its factorization.

13977161856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733306 (or 1733291 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 13977161856 in words is "thirteen billion, nine hundred seventy-seven million, one hundred sixty-one thousand, eight hundred fifty-six".