645274124524 has 24 divisors (see below), whose sum is σ = 1153298539008. Its totient is φ = 315760764240.

The previous prime is 645274124507. The next prime is 645274124581. The reversal of 645274124524 is 425421472546.

645274124524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7296129 + ... + 7384039.

It is an arithmetic number, because the mean of its divisors is an integer number (48054105792).

Almost surely, 2^645274124524 is an apocalyptic number.

It is an amenable number.

645274124524 is a deficient number, since it is larger than the sum of its proper divisors (508024414484).

645274124524 is a wasteful number, since it uses less digits than its factorization.

645274124524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127005 (or 127003 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 46.

The spelling of 645274124524 in words is "six hundred forty-five billion, two hundred seventy-four million, one hundred twenty-four thousand, five hundred twenty-four".