11655807655857 has 4 divisors (see below), whose sum is σ = 15541076874480. Its totient is φ = 7770538437236.

The previous prime is 11655807655847. The next prime is 11655807655859. The reversal of 11655807655857 is 75855670855611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11655807655857 - 2⁴ = 11655807655841 is a prime.

It is a super-2 number, since 2×11655807655857² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11655807655791 and 11655807655800.

It is not an unprimeable number, because it can be changed into a prime (11655807655859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1942634609307 + ... + 1942634609312.

It is an arithmetic number, because the mean of its divisors is an integer number (3885269218620).

Almost surely, 2^{11655807655857} is an apocalyptic number.

It is an amenable number.

11655807655857 is a deficient number, since it is larger than the sum of its proper divisors (3885269218623).

11655807655857 is an equidigital number, since it uses as much as digits as its factorization.

11655807655857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885269218622.

The product of its (nonzero) digits is 352800000, while the sum is 69.

The spelling of 11655807655857 in words is "eleven trillion, six hundred fifty-five billion, eight hundred seven million, six hundred fifty-five thousand, eight hundred fifty-seven".