115561061451 has 80 divisors (see below), whose sum is σ = 198972787200. Its totient is φ = 66103387200.

The previous prime is 115561061437. The next prime is 115561061501. The reversal of 115561061451 is 154160165511.

115561061451 is a `hidden beast` number, since 1 + 1 + 556 + 1 + 0 + 61 + 45 + 1 = 666.

It is not a de Polignac number, because 115561061451 - 2¹⁰ = 115561060427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115561061401) 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, 4575165 + ... + 4600353.

It is an arithmetic number, because the mean of its divisors is an integer number (2487159840).

Almost surely, 2^115561061451 is an apocalyptic number.

115561061451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115561061451 is a deficient number, since it is larger than the sum of its proper divisors (83411725749).

115561061451 is a wasteful number, since it uses less digits than its factorization.

115561061451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25502 (or 25493 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 115561061451 in words is "one hundred fifteen billion, five hundred sixty-one million, sixty-one thousand, four hundred fifty-one".