648791331264 has 42 divisors (see below), whose sum is σ = 1859643209840. Its totient is φ = 216263776896.

The previous prime is 648791331229. The next prime is 648791331277. The reversal of 648791331264 is 462133197846.

648791331264 is a `hidden beast` number, since 6 + 48 + 7 + 9 + 1 + 331 + 264 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 648791331264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563186344 + ... + 563187495.

Almost surely, 2^648791331264 is an apocalyptic number.

648791331264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

648791331264 is an abundant number, since it is smaller than the sum of its proper divisors (1210851878576).

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

648791331264 is a wasteful number, since it uses less digits than its factorization.

648791331264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126373857 (or 1126373844 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 648791331264 in words is "six hundred forty-eight billion, seven hundred ninety-one million, three hundred thirty-one thousand, two hundred sixty-four".