115666401000 has 64 divisors (see below), whose sum is σ = 360879180480. Its totient is φ = 30844372800.

The previous prime is 115666400999. The next prime is 115666401013. The reversal of 115666401000 is 104666511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19274734 + ... + 19280733.

It is an arithmetic number, because the mean of its divisors is an integer number (5638737195).

Almost surely, 2^115666401000 is an apocalyptic number.

115666401000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115666401000 is an abundant number, since it is smaller than the sum of its proper divisors (245212779480).

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

115666401000 is a wasteful number, since it uses less digits than its factorization.

115666401000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38555491 (or 38555477 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 115666401000 in words is "one hundred fifteen billion, six hundred sixty-six million, four hundred one thousand".