642061584 has 60 divisors (see below), whose sum is σ = 1854857472. Its totient is φ = 207115200.

The previous prime is 642061573. The next prime is 642061619. The reversal of 642061584 is 485160246.

642061584 is a `hidden beast` number, since 642 + 0 + 6 + 1 + 5 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67452 + ... + 76379.

Almost surely, 2^642061584 is an apocalyptic number.

It is an amenable number.

642061584 is an abundant number, since it is smaller than the sum of its proper divisors (1212795888).

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

642061584 is a wasteful number, since it uses less digits than its factorization.

642061584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143876 (or 143867 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 642061584 is about 25338.9341528013. The cubic root of 642061584 is about 862.6982067476.

The spelling of 642061584 in words is "six hundred forty-two million, sixty-one thousand, five hundred eighty-four".