125017989903 has 12 divisors (see below), whose sum is σ = 182269220328. Its totient is φ = 82566397680.

The previous prime is 125017989893. The next prime is 125017989907. The reversal of 125017989903 is 309989710521.

It is a de Polignac number, because none of the positive numbers 2^k-125017989903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125017989903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125017989907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64909728 + ... + 64911653.

It is an arithmetic number, because the mean of its divisors is an integer number (15189101694).

Almost surely, 2^125017989903 is an apocalyptic number.

125017989903 is a deficient number, since it is larger than the sum of its proper divisors (57251230425).

125017989903 is a wasteful number, since it uses less digits than its factorization.

125017989903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129821494 (or 129821491 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 125017989903 in words is "one hundred twenty-five billion, seventeen million, nine hundred eighty-nine thousand, nine hundred three".