125621264644 has 12 divisors (see below), whose sum is σ = 225199096668. Its totient is φ = 61278665600.

The previous prime is 125621264623. The next prime is 125621264651. The reversal of 125621264644 is 446462126521.

It can be written as a sum of positive squares in 2 ways, for example, as 20426126400 + 105195138244 = 142920^2 + 324338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125621264644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382991497 + ... + 382991824.

It is an arithmetic number, because the mean of its divisors is an integer number (18766591389).

Almost surely, 2^125621264644 is an apocalyptic number.

It is an amenable number.

125621264644 is a deficient number, since it is larger than the sum of its proper divisors (99577832024).

125621264644 is a wasteful number, since it uses less digits than its factorization.

125621264644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765983366 (or 765983364 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The spelling of 125621264644 in words is "one hundred twenty-five billion, six hundred twenty-one million, two hundred sixty-four thousand, six hundred forty-four".