642237874480 has 40 divisors (see below), whose sum is σ = 1493242707600. Its totient is φ = 256888328448.

The previous prime is 642237874471. The next prime is 642237874493. The reversal of 642237874480 is 84478732246.

It is a tau number, because it is divible by the number of its divisors (40).

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, 3826566 + ... + 3990874.

It is an arithmetic number, because the mean of its divisors is an integer number (37331067690).

Almost surely, 2^642237874480 is an apocalyptic number.

It is an amenable number.

642237874480 is an abundant number, since it is smaller than the sum of its proper divisors (851004833120).

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

642237874480 is a wasteful number, since it uses less digits than its factorization.

642237874480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213181 (or 213175 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 55.

The spelling of 642237874480 in words is "six hundred forty-two billion, two hundred thirty-seven million, eight hundred seventy-four thousand, four hundred eighty".