642747834504 has 64 divisors (see below), whose sum is σ = 1785517344000. Its totient is φ = 214236475200.

The previous prime is 642747834497. The next prime is 642747834541. The reversal of 642747834504 is 405438747246.

642747834504 is a `hidden beast` number, since 6 + 42 + 74 + 7 + 83 + 450 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 3959857 + ... + 4118975.

It is an arithmetic number, because the mean of its divisors is an integer number (27898708500).

Almost surely, 2^642747834504 is an apocalyptic number.

It is an amenable number.

642747834504 is an abundant number, since it is smaller than the sum of its proper divisors (1142769509496).

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

642747834504 is a wasteful number, since it uses less digits than its factorization.

642747834504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177835 (or 177825 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 54.

The spelling of 642747834504 in words is "six hundred forty-two billion, seven hundred forty-seven million, eight hundred thirty-four thousand, five hundred four".