642426225036 has 48 divisors (see below), whose sum is σ = 1501987221504. Its totient is φ = 213714775296.

The previous prime is 642426225029. The next prime is 642426225053. The reversal of 642426225036 is 630522624246.

It is a happy number.

It is a super-2 number, since 2×642426225036² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26509221 + ... + 26533443.

It is an arithmetic number, because the mean of its divisors is an integer number (31291400448).

Almost surely, 2^642426225036 is an apocalyptic number.

It is an amenable number.

642426225036 is an abundant number, since it is smaller than the sum of its proper divisors (859560996468).

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

642426225036 is a wasteful number, since it uses less digits than its factorization.

642426225036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28550 (or 28548 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 642426225036 in words is "six hundred forty-two billion, four hundred twenty-six million, two hundred twenty-five thousand, thirty-six".