115155520100 has 72 divisors (see below), whose sum is σ = 251373239208. Its totient is φ = 45789004800.

The previous prime is 115155520099. The next prime is 115155520111. The reversal of 115155520100 is 1025551511.

It can be written as a sum of positive squares in 12 ways, for example, as 6936890944 + 108218629156 = 83288^2 + 328966^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 115155520100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15397562 + ... + 15405038.

It is an arithmetic number, because the mean of its divisors is an integer number (3491294989).

Almost surely, 2^115155520100 is an apocalyptic number.

115155520100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115155520100 is an abundant number, since it is smaller than the sum of its proper divisors (136217719108).

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

115155520100 is a wasteful number, since it uses less digits than its factorization.

115155520100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8385 (or 8378 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 26.

The spelling of 115155520100 in words is "one hundred fifteen billion, one hundred fifty-five million, five hundred twenty thousand, one hundred".