648635164 has 6 divisors (see below), whose sum is σ = 1135111544. Its totient is φ = 324317580.

The previous prime is 648635137. The next prime is 648635173. The reversal of 648635164 is 461536846.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 648635164.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81079392 + ... + 81079399.

Almost surely, 2^648635164 is an apocalyptic number.

It is an amenable number.

648635164 is a deficient number, since it is larger than the sum of its proper divisors (486476380).

648635164 is a wasteful number, since it uses less digits than its factorization.

648635164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162158795 (or 162158793 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 648635164 is about 25468.3168662556. The cubic root of 648635164 is about 865.6323859692.

The spelling of 648635164 in words is "six hundred forty-eight million, six hundred thirty-five thousand, one hundred sixty-four".