125042115555 has 64 divisors (see below), whose sum is σ = 254479104000. Its totient is φ = 57066422400.

The previous prime is 125042115551. The next prime is 125042115557. The reversal of 125042115555 is 555511240521.

125042115555 is a `hidden beast` number, since 1 + 2 + 50 + 42 + 1 + 15 + 555 = 666.

It is not a de Polignac number, because 125042115555 - 2² = 125042115551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125042115551) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 455605 + ... + 676505.

It is an arithmetic number, because the mean of its divisors is an integer number (3976236000).

Almost surely, 2^125042115555 is an apocalyptic number.

125042115555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125042115555 is an abundant number, since it is smaller than the sum of its proper divisors (129436988445).

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

125042115555 is a wasteful number, since it uses less digits than its factorization.

125042115555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221521 (or 221515 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 36.

The spelling of 125042115555 in words is "one hundred twenty-five billion, forty-two million, one hundred fifteen thousand, five hundred fifty-five".