648102372520 has 32 divisors (see below), whose sum is σ = 1458267572520. Its totient is φ = 259234329600.

The previous prime is 648102372509. The next prime is 648102372521. The reversal of 648102372520 is 25273201846.

648102372520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 385862107684 + 262240264836 = 621178^2 + 512094^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (648102372521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567084 + ... + 1936996.

Almost surely, 2^648102372520 is an apocalyptic number.

It is an amenable number.

648102372520 is an abundant number, since it is smaller than the sum of its proper divisors (810165200000).

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

648102372520 is a wasteful number, since it uses less digits than its factorization.

648102372520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413725 (or 413721 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 648102372520 in words is "six hundred forty-eight billion, one hundred two million, three hundred seventy-two thousand, five hundred twenty".