642260324788 has 12 divisors (see below), whose sum is σ = 1125655959652. Its totient is φ = 320644336320.

The previous prime is 642260324777. The next prime is 642260324831. The reversal of 642260324788 is 887423062246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 578971853604 + 63288471184 = 760902^2 + 251572^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121453545 + ... + 121458832.

Almost surely, 2^642260324788 is an apocalyptic number.

It is an amenable number.

642260324788 is a deficient number, since it is larger than the sum of its proper divisors (483395634864).

642260324788 is a wasteful number, since it uses less digits than its factorization.

642260324788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242913042 (or 242913040 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 52.

The spelling of 642260324788 in words is "six hundred forty-two billion, two hundred sixty million, three hundred twenty-four thousand, seven hundred eighty-eight".