115661004 has 24 divisors (see below), whose sum is σ = 274451520. Its totient is φ = 37899984.

The previous prime is 115661003. The next prime is 115661009. The reversal of 115661004 is 400166511.

It is not an unprimeable number, because it can be changed into a prime (115661003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80974 + ... + 82389.

It is an arithmetic number, because the mean of its divisors is an integer number (11435480).

Almost surely, 2^115661004 is an apocalyptic number.

It is an amenable number.

115661004 is an abundant number, since it is smaller than the sum of its proper divisors (158790516).

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

115661004 is a wasteful number, since it uses less digits than its factorization.

115661004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163429 (or 163427 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 115661004 is about 10754.5806054909. The cubic root of 115661004 is about 487.2243512032.

The spelling of 115661004 in words is "one hundred fifteen million, six hundred sixty-one thousand, four".