125531695989 has 24 divisors (see below), whose sum is σ = 208384637760. Its totient is φ = 71331651648.

The previous prime is 125531695969. The next prime is 125531695999. The reversal of 125531695989 is 989596135521.

125531695989 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 31 + 6 + 9 + 598 + 9 = 666.

It is not a de Polignac number, because 125531695989 - 2¹¹ = 125531693941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125531695969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5554552 + ... + 5577105.

It is an arithmetic number, because the mean of its divisors is an integer number (8682693240).

Almost surely, 2^125531695989 is an apocalyptic number.

It is an amenable number.

125531695989 is a deficient number, since it is larger than the sum of its proper divisors (82852941771).

125531695989 is a wasteful number, since it uses less digits than its factorization.

125531695989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131849 (or 11131846 counting only the distinct ones).

The product of its digits is 26244000, while the sum is 63.

The spelling of 125531695989 in words is "one hundred twenty-five billion, five hundred thirty-one million, six hundred ninety-five thousand, nine hundred eighty-nine".