11656508455 has 32 divisors (see below), whose sum is σ = 14931671040. Its totient is φ = 8710571520.

The previous prime is 11656508449. The next prime is 11656508459. The reversal of 11656508455 is 55480565611.

It is not a de Polignac number, because 11656508455 - 2¹⁹ = 11655984167 is a prime.

It is a super-2 number, since 2×11656508455² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656508459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2355714 + ... + 2360656.

It is an arithmetic number, because the mean of its divisors is an integer number (466614720).

Almost surely, 2^11656508455 is an apocalyptic number.

11656508455 is a deficient number, since it is larger than the sum of its proper divisors (3275162585).

11656508455 is a wasteful number, since it uses less digits than its factorization.

11656508455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311.

The product of its (nonzero) digits is 720000, while the sum is 46.

The spelling of 11656508455 in words is "eleven billion, six hundred fifty-six million, five hundred eight thousand, four hundred fifty-five".