125431443344520 has 128 divisors (see below), whose sum is σ = 418108482288000. Its totient is φ = 33448091201280.

The previous prime is 125431443344503. The next prime is 125431443344567. The reversal of 125431443344520 is 25443344134521.

It is a happy number.

125431443344520 is a `hidden beast` number, since 1 + 2 + 5 + 43 + 1 + 4 + 43 + 3 + 44 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140626111 + ... + 141515249.

It is an arithmetic number, because the mean of its divisors is an integer number (3266472517875).

Almost surely, 2^{125431443344520} is an apocalyptic number.

125431443344520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125431443344520 is an abundant number, since it is smaller than the sum of its proper divisors (292677038943480).

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

125431443344520 is a wasteful number, since it uses less digits than its factorization.

125431443344520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019780 (or 1019770 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 45.

The spelling of 125431443344520 in words is "one hundred twenty-five trillion, four hundred thirty-one billion, four hundred forty-three million, three hundred forty-four thousand, five hundred twenty".