116401226306661 has 6 divisors (see below), whose sum is σ = 168135104665190. Its totient is φ = 77600817537768.

The previous prime is 116401226306657. The next prime is 116401226306671. The reversal of 116401226306661 is 166603622104611.

It can be written as a sum of positive squares in only one way, i.e., 65872799834436 + 50528426472225 = 8116206^2 + 7108335^2 .

It is not a de Polignac number, because 116401226306661 - 2² = 116401226306657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116401226306671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6466734794806 + ... + 6466734794823.

Almost surely, 2^{116401226306661} is an apocalyptic number.

It is an amenable number.

116401226306661 is a deficient number, since it is larger than the sum of its proper divisors (51733878358529).

116401226306661 is a wasteful number, since it uses less digits than its factorization.

116401226306661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12933469589635 (or 12933469589632 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 116401226306661 in words is "one hundred sixteen trillion, four hundred one billion, two hundred twenty-six million, three hundred six thousand, six hundred sixty-one".