11687380656 has 80 divisors (see below), whose sum is σ = 34653924864. Its totient is φ = 3324897792.

The previous prime is 11687380651. The next prime is 11687380669. The reversal of 11687380656 is 65608378611.

11687380656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11687380599 and 11687380608.

It is not an unprimeable number, because it can be changed into a prime (11687380651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3645 + ... + 152931.

Almost surely, 2^11687380656 is an apocalyptic number.

11687380656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11687380656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17326962432).

11687380656 is an abundant number, since it is smaller than the sum of its proper divisors (22966544208).

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

11687380656 is a wasteful number, since it uses less digits than its factorization.

11687380656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149538 (or 149532 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 11687380656 in words is "eleven billion, six hundred eighty-seven million, three hundred eighty thousand, six hundred fifty-six".