74972646864 has 30 divisors (see below), whose sum is σ = 209819282946. Its totient is φ = 24990882240.

The previous prime is 74972646857. The next prime is 74972646871. The reversal of 74972646864 is 46864627947.

74972646864 is a `hidden beast` number, since 7 + 4 + 97 + 26 + 468 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (74972646857) and next prime (74972646871).

It can be written as a sum of positive squares in only one way, i.e., 73647104400 + 1325542464 = 271380^2 + 36408^2 .

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, 260321547 + ... + 260321834.

Almost surely, 2^74972646864 is an apocalyptic number.

It is an amenable number.

74972646864 is an abundant number, since it is smaller than the sum of its proper divisors (134846636082).

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

74972646864 is a wasteful number, since it uses less digits than its factorization.

74972646864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520643395 (or 520643386 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

The spelling of 74972646864 in words is "seventy-four billion, nine hundred seventy-two million, six hundred forty-six thousand, eight hundred sixty-four".