125515501100 has 72 divisors (see below), whose sum is σ = 310048155648. Its totient is φ = 43657556800.

The previous prime is 125515501051. The next prime is 125515501157. The reversal of 125515501100 is 1105515521.

It is a self number, because there is not a number n which added to its sum of digits gives 125515501100.

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 23 ways as a sum of consecutive naturals, for example, 2455244 + ... + 2505843.

It is an arithmetic number, because the mean of its divisors is an integer number (4306224384).

Almost surely, 2^125515501100 is an apocalyptic number.

125515501100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125515501100 is an abundant number, since it is smaller than the sum of its proper divisors (184532654548).

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

125515501100 is a wasteful number, since it uses less digits than its factorization.

125515501100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961135 (or 4961128 counting only the distinct ones).

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

The spelling of 125515501100 in words is "one hundred twenty-five billion, five hundred fifteen million, five hundred one thousand, one hundred".