116611649991 has 144 divisors (see below), whose sum is σ = 191443480800. Its totient is φ = 68263243776.

The previous prime is 116611649969. The next prime is 116611649993. The reversal of 116611649991 is 199946116611.

116611649991 is a `hidden beast` number, since 1 + 1 + 6 + 61 + 1 + 6 + 499 + 91 = 666.

It is not a de Polignac number, because 116611649991 - 2²² = 116607455687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116611649993) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 509221065 + ... + 509221293.

Almost surely, 2^116611649991 is an apocalyptic number.

116611649991 is a deficient number, since it is larger than the sum of its proper divisors (74831830809).

116611649991 is a wasteful number, since it uses less digits than its factorization.

116611649991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 478 counting only the distinct ones).

The product of its digits is 629856, while the sum is 54.

The spelling of 116611649991 in words is "one hundred sixteen billion, six hundred eleven million, six hundred forty-nine thousand, nine hundred ninety-one".