11612556720 has 60 divisors (see below), whose sum is σ = 38998838736. Its totient is φ = 3096681600.

The previous prime is 11612556713. The next prime is 11612556721. The reversal of 11612556720 is 2765521611.

11612556720 is a `hidden beast` number, since 11 + 61 + 2 + 5 + 567 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11612556721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8063556 + ... + 8064995.

Almost surely, 2^11612556720 is an apocalyptic number.

11612556720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11612556720 is an abundant number, since it is smaller than the sum of its proper divisors (27386282016).

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

11612556720 is a wasteful number, since it uses less digits than its factorization.

11612556720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16128570 (or 16128561 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 11612556720 in words is "eleven billion, six hundred twelve million, five hundred fifty-six thousand, seven hundred twenty".