13865772156 has 48 divisors (see below), whose sum is σ = 32721151008. Its totient is φ = 4569696000.

The previous prime is 13865772149. The next prime is 13865772211. The reversal of 13865772156 is 65127756831.

It is a junction number, because it is equal to n+sod(n) for n = 13865772099 and 13865772108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357306 + ... + 394206.

It is an arithmetic number, because the mean of its divisors is an integer number (681690646).

Almost surely, 2^13865772156 is an apocalyptic number.

It is an amenable number.

13865772156 is an abundant number, since it is smaller than the sum of its proper divisors (18855378852).

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

13865772156 is a wasteful number, since it uses less digits than its factorization.

13865772156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37262 (or 37260 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The spelling of 13865772156 in words is "thirteen billion, eight hundred sixty-five million, seven hundred seventy-two thousand, one hundred fifty-six".