11657656580823 has 80 divisors (see below), whose sum is σ = 19202987089440. Its totient is φ = 7047423947520.

The previous prime is 11657656580819. The next prime is 11657656580831. The reversal of 11657656580823 is 32808565675611.

11657656580823 is a `hidden beast` number, since 1 + 1 + 6 + 576 + 5 + 6 + 58 + 0 + 8 + 2 + 3 = 666.

It is not a de Polignac number, because 11657656580823 - 2² = 11657656580819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11657656580623) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42664783 + ... + 42937151.

It is an arithmetic number, because the mean of its divisors is an integer number (240037338618).

Almost surely, 2^{11657656580823} is an apocalyptic number.

11657656580823 is a deficient number, since it is larger than the sum of its proper divisors (7545330508617).

11657656580823 is an equidigital number, since it uses as much as digits as its factorization.

11657656580823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272811 (or 272780 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 63.

The spelling of 11657656580823 in words is "eleven trillion, six hundred fifty-seven billion, six hundred fifty-six million, five hundred eighty thousand, eight hundred twenty-three".