642051883508 has 12 divisors (see below), whose sum is σ = 1284103767072. Its totient is φ = 275165092920.

The previous prime is 642051883489. The next prime is 642051883537. The reversal of 642051883508 is 805388150246.

642051883508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

642051883508 is an admirable number.

It is a super-2 number, since 2×642051883508² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11465212178 + ... + 11465212233.

It is an arithmetic number, because the mean of its divisors is an integer number (107008647256).

Almost surely, 2^642051883508 is an apocalyptic number.

It is an amenable number.

642051883508 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

642051883508 is a wasteful number, since it uses less digits than its factorization.

642051883508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22930424422 (or 22930424420 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 50.

The spelling of 642051883508 in words is "six hundred forty-two billion, fifty-one million, eight hundred eighty-three thousand, five hundred eight".