115661416455 has 32 divisors (see below), whose sum is σ = 221437245120. Its totient is φ = 56941004160.

The previous prime is 115661416397. The next prime is 115661416463. The reversal of 115661416455 is 554614166511.

It is a happy number.

115661416455 is a `hidden beast` number, since 1 + 1 + 56 + 6 + 141 + 6 + 455 = 666.

It is not a de Polignac number, because 115661416455 - 2²² = 115657222151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 115661416455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32950216 + ... + 32953725.

It is an arithmetic number, because the mean of its divisors is an integer number (6919913910).

Almost surely, 2^115661416455 is an apocalyptic number.

115661416455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115661416455 is a deficient number, since it is larger than the sum of its proper divisors (105775828665).

115661416455 is a wasteful number, since it uses less digits than its factorization.

115661416455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65903968 (or 65903962 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 115661416455 in words is "one hundred fifteen billion, six hundred sixty-one million, four hundred sixteen thousand, four hundred fifty-five".