116721605556 has 60 divisors (see below), whose sum is σ = 313380212068. Its totient is φ = 37855651968.

The previous prime is 116721605551. The next prime is 116721605557. The reversal of 116721605556 is 655506127611.

It is a happy number.

116721605556 is a `hidden beast` number, since 1 + 16 + 7 + 21 + 60 + 5 + 556 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107168497956 + 9553107600 = 327366^2 + 97740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116721605551) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4856281 + ... + 4880256.

Almost surely, 2^116721605556 is an apocalyptic number.

It is an amenable number.

116721605556 is an abundant number, since it is smaller than the sum of its proper divisors (196658606512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

116721605556 is a wasteful number, since it uses less digits than its factorization.

116721605556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736590 (or 9736579 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 116721605556 in words is "one hundred sixteen billion, seven hundred twenty-one million, six hundred five thousand, five hundred fifty-six".