115978611 has 16 divisors (see below), whose sum is σ = 180840704. Its totient is φ = 64731744.

The previous prime is 115978589. The next prime is 115978637. The reversal of 115978611 is 116879511.

It is not a de Polignac number, because 115978611 - 2⁵ = 115978579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115978611.

It is not an unprimeable number, because it can be changed into a prime (115978651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63316 + ... + 65121.

It is an arithmetic number, because the mean of its divisors is an integer number (11302544).

Almost surely, 2^115978611 is an apocalyptic number.

115978611 is a deficient number, since it is larger than the sum of its proper divisors (64862093).

115978611 is a wasteful number, since it uses less digits than its factorization.

115978611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128490.

The product of its digits is 15120, while the sum is 39.

The square root of 115978611 is about 10769.3366090953. The cubic root of 115978611 is about 487.6699189398.

The spelling of 115978611 in words is "one hundred fifteen million, nine hundred seventy-eight thousand, six hundred eleven".