642502242888 has 32 divisors (see below), whose sum is σ = 1752278844960. Its totient is φ = 194697649280.

The previous prime is 642502242869. The next prime is 642502242929. The reversal of 642502242888 is 888242205246.

It is a happy number.

It is a super-2 number, since 2×642502242888² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642502242888.

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, 1216860045 + ... + 1216860572.

It is an arithmetic number, because the mean of its divisors is an integer number (54758713905).

Almost surely, 2^642502242888 is an apocalyptic number.

It is an amenable number.

642502242888 is an abundant number, since it is smaller than the sum of its proper divisors (1109776602072).

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

642502242888 is a wasteful number, since it uses less digits than its factorization.

642502242888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433720637 (or 2433720633 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 51.

The spelling of 642502242888 in words is "six hundred forty-two billion, five hundred two million, two hundred forty-two thousand, eight hundred eighty-eight".