642081041508 has 24 divisors (see below), whose sum is σ = 1498928270112. Its totient is φ = 213921417664.

The previous prime is 642081041471. The next prime is 642081041587. The reversal of 642081041508 is 805140180246.

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 7 ways as a sum of consecutive naturals, for example, 13174185 + ... + 13222832.

It is an arithmetic number, because the mean of its divisors is an integer number (62455344588).

Almost surely, 2^642081041508 is an apocalyptic number.

It is an amenable number.

642081041508 is an abundant number, since it is smaller than the sum of its proper divisors (856847228604).

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

642081041508 is a wasteful number, since it uses less digits than its factorization.

642081041508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26399051 (or 26399049 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 642081041508 in words is "six hundred forty-two billion, eighty-one million, forty-one thousand, five hundred eight".