125645640636 has 24 divisors (see below), whose sum is σ = 294109825744. Its totient is φ = 41748071040.

The previous prime is 125645640599. The next prime is 125645640691. The reversal of 125645640636 is 636046546521.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16722235 + ... + 16729746.

Almost surely, 2^125645640636 is an apocalyptic number.

It is an amenable number.

125645640636 is an abundant number, since it is smaller than the sum of its proper divisors (168464185108).

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

125645640636 is a wasteful number, since it uses less digits than its factorization.

125645640636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33452301 (or 33452299 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 125645640636 in words is "one hundred twenty-five billion, six hundred forty-five million, six hundred forty thousand, six hundred thirty-six".