642031188442 has 64 divisors (see below), whose sum is σ = 1153533830400. Its totient is φ = 262189509120.

The previous prime is 642031188433. The next prime is 642031188493. The reversal of 642031188442 is 244881130246.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19532073 + ... + 19564915.

It is an arithmetic number, because the mean of its divisors is an integer number (18023966100).

Almost surely, 2^642031188442 is an apocalyptic number.

642031188442 is a deficient number, since it is larger than the sum of its proper divisors (511502641958).

642031188442 is a wasteful number, since it uses less digits than its factorization.

642031188442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33511.

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 642031188442 in words is "six hundred forty-two billion, thirty-one million, one hundred eighty-eight thousand, four hundred forty-two".