11387665056 has 48 divisors (see below), whose sum is σ = 31192305984. Its totient is φ = 3630849024.

The previous prime is 11387665039. The next prime is 11387665187. The reversal of 11387665056 is 65056678311.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 11387664996 and 11387665014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576521 + ... + 2580936.

It is an arithmetic number, because the mean of its divisors is an integer number (649839708).

Almost surely, 2^11387665056 is an apocalyptic number.

11387665056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11387665056 is an abundant number, since it is smaller than the sum of its proper divisors (19804640928).

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

11387665056 is a wasteful number, since it uses less digits than its factorization.

11387665056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157493 (or 5157485 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 11387665056 in words is "eleven billion, three hundred eighty-seven million, six hundred sixty-five thousand, fifty-six".