648774548420 has 12 divisors (see below), whose sum is σ = 1362426551724. Its totient is φ = 259509819360.

The previous prime is 648774548417. The next prime is 648774548431. The reversal of 648774548420 is 24845477846.

It can be written as a sum of positive squares in 2 ways, for example, as 126701826304 + 522072722116 = 355952^2 + 722546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 648774548420.

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, 16219363691 + ... + 16219363730.

It is an arithmetic number, because the mean of its divisors is an integer number (113535545977).

Almost surely, 2^648774548420 is an apocalyptic number.

It is an amenable number.

648774548420 is an abundant number, since it is smaller than the sum of its proper divisors (713652003304).

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

648774548420 is a wasteful number, since it uses less digits than its factorization.

648774548420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32438727430 (or 32438727428 counting only the distinct ones).

The product of its (nonzero) digits is 48168960, while the sum is 59.

The spelling of 648774548420 in words is "six hundred forty-eight billion, seven hundred seventy-four million, five hundred forty-eight thousand, four hundred twenty".