125555657250 has 64 divisors (see below), whose sum is σ = 313440865920. Its totient is φ = 33475745600.

The previous prime is 125555657231. The next prime is 125555657251. The reversal of 125555657250 is 52756555521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125555657250.

It is not an unprimeable number, because it can be changed into a prime (125555657251) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6041377 + ... + 6062123.

It is an arithmetic number, because the mean of its divisors is an integer number (4897513530).

Almost surely, 2^125555657250 is an apocalyptic number.

125555657250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125555657250 is an abundant number, since it is smaller than the sum of its proper divisors (187885208670).

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

125555657250 is a wasteful number, since it uses less digits than its factorization.

125555657250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28836 (or 28826 counting only the distinct ones).

The product of its (nonzero) digits is 2625000, while the sum is 48.

The spelling of 125555657250 in words is "one hundred twenty-five billion, five hundred fifty-five million, six hundred fifty-seven thousand, two hundred fifty".