13377977856 has 60 divisors (see below), whose sum is σ = 38609763192. Its totient is φ = 4459324416.

The previous prime is 13377977831. The next prime is 13377977887. The reversal of 13377977856 is 65877977331.

It is a super-3 number, since 3×13377977856³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13377977793 and 13377977802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1446996 + ... + 1456211.

Almost surely, 2^13377977856 is an apocalyptic number.

13377977856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13377977856 is an abundant number, since it is smaller than the sum of its proper divisors (25231785336).

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

13377977856 is an equidigital number, since it uses as much as digits as its factorization.

13377977856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903231 (or 2903212 counting only the distinct ones).

The product of its digits is 46675440, while the sum is 63.

The spelling of 13377977856 in words is "thirteen billion, three hundred seventy-seven million, nine hundred seventy-seven thousand, eight hundred fifty-six".