125062521640 has 96 divisors (see below), whose sum is σ = 346586924520. Its totient is φ = 40356298752.

The previous prime is 125062521637. The next prime is 125062521671. The reversal of 125062521640 is 46125260521.

It can be written as a sum of positive squares in 4 ways, for example, as 83813724036 + 41248797604 = 289506^2 + 203098^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 125062521596 and 125062521605.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1843369 + ... + 1910008.

Almost surely, 2^125062521640 is an apocalyptic number.

125062521640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125062521640 is an abundant number, since it is smaller than the sum of its proper divisors (221524402880).

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

125062521640 is a wasteful number, since it uses less digits than its factorization.

125062521640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753419 (or 3753408 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 125062521640 in words is "one hundred twenty-five billion, sixty-two million, five hundred twenty-one thousand, six hundred forty".