116661560565 has 32 divisors (see below), whose sum is σ = 214344691200. Its totient is φ = 53586169920.

The previous prime is 116661560479. The next prime is 116661560567. The reversal of 116661560565 is 565065166611.

It is not a de Polignac number, because 116661560565 - 2⁷ = 116661560437 is a prime.

It is a super-2 number, since 2×116661560565² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116661560567) 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, 18603175 + ... + 18609444.

It is an arithmetic number, because the mean of its divisors is an integer number (6698271600).

Almost surely, 2^116661560565 is an apocalyptic number.

116661560565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

116661560565 is a deficient number, since it is larger than the sum of its proper divisors (97683130635).

116661560565 is a wasteful number, since it uses less digits than its factorization.

116661560565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37212657.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 116661560565 in words is "one hundred sixteen billion, six hundred sixty-one million, five hundred sixty thousand, five hundred sixty-five".