42664637878680 has 64 divisors (see below), whose sum is σ = 127998526255200. Its totient is φ = 11376826757120.

The previous prime is 42664637878619. The next prime is 42664637878703. The reversal of 42664637878680 is 8687873646624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3055431 + ... + 9729590.

Almost surely, 2^{42664637878680} is an apocalyptic number.

42664637878680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42664637878680 is an abundant number, since it is smaller than the sum of its proper divisors (85333888376520).

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

42664637878680 is a wasteful number, since it uses less digits than its factorization.

42664637878680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12812844 (or 12812840 counting only the distinct ones).

The product of its (nonzero) digits is 3121348608, while the sum is 75.

The spelling of 42664637878680 in words is "forty-two trillion, six hundred sixty-four billion, six hundred thirty-seven million, eight hundred seventy-eight thousand, six hundred eighty".