13777209456 has 20 divisors (see below), whose sum is σ = 35591124552. Its totient is φ = 4592403136.

The previous prime is 13777209449. The next prime is 13777209493. The reversal of 13777209456 is 65490277731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13777209399 and 13777209408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143512551 + ... + 143512646.

Almost surely, 2^13777209456 is an apocalyptic number.

13777209456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13777209456 is an abundant number, since it is smaller than the sum of its proper divisors (21813915096).

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

13777209456 is a wasteful number, since it uses less digits than its factorization.

13777209456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287025208 (or 287025202 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 51.

The spelling of 13777209456 in words is "thirteen billion, seven hundred seventy-seven million, two hundred nine thousand, four hundred fifty-six".