116561605601 has 4 divisors (see below), whose sum is σ = 133213263552. Its totient is φ = 99909947652.

The previous prime is 116561605591. The next prime is 116561605627. The reversal of 116561605601 is 106506165611.

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 a de Polignac number, because none of the positive numbers 2^k-116561605601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116561605001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8325828965 + ... + 8325828978.

It is an arithmetic number, because the mean of its divisors is an integer number (33303315888).

Almost surely, 2^116561605601 is an apocalyptic number.

It is an amenable number.

116561605601 is a deficient number, since it is larger than the sum of its proper divisors (16651657951).

116561605601 is an equidigital number, since it uses as much as digits as its factorization.

116561605601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16651657950.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 116561605601 in words is "one hundred sixteen billion, five hundred sixty-one million, six hundred five thousand, six hundred one".