649271076964 has 24 divisors (see below), whose sum is σ = 1205637320160. Its totient is φ = 304885055616.

The previous prime is 649271076931. The next prime is 649271076977. The reversal of 649271076964 is 469670172946.

It is a super-2 number, since 2×649271076964² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10191054 + ... + 10254565.

It is an arithmetic number, because the mean of its divisors is an integer number (50234888340).

Almost surely, 2^649271076964 is an apocalyptic number.

It is an amenable number.

649271076964 is a deficient number, since it is larger than the sum of its proper divisors (556366243196).

649271076964 is a wasteful number, since it uses less digits than its factorization.

649271076964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20446107 (or 20446105 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 61.

The spelling of 649271076964 in words is "six hundred forty-nine billion, two hundred seventy-one million, seventy-six thousand, nine hundred sixty-four".