648737367408764 has 6 divisors (see below), whose sum is σ = 1135290392965344. Its totient is φ = 324368683704380.

The previous prime is 648737367408731. The next prime is 648737367408803. The reversal of 648737367408764 is 467804763737846.

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, 81092170926092 + ... + 81092170926099.

It is an arithmetic number, because the mean of its divisors is an integer number (189215065494224).

Almost surely, 2^{648737367408764} is an apocalyptic number.

It is an amenable number.

648737367408764 is a deficient number, since it is larger than the sum of its proper divisors (486553025556580).

648737367408764 is a wasteful number, since it uses less digits than its factorization.

648737367408764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162184341852195 (or 162184341852193 counting only the distinct ones).

The product of its (nonzero) digits is 19118260224, while the sum is 80.

The spelling of 648737367408764 in words is "six hundred forty-eight trillion, seven hundred thirty-seven billion, three hundred sixty-seven million, four hundred eight thousand, seven hundred sixty-four".