642710102780 has 24 divisors (see below), whose sum is σ = 1350248350752. Its totient is φ = 256977920192.

The previous prime is 642710102737. The next prime is 642710102849. The reversal of 642710102780 is 87201017246.

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 7 ways as a sum of consecutive naturals, for example, 6582887 + ... + 6679806.

It is an arithmetic number, because the mean of its divisors is an integer number (56260347948).

Almost surely, 2^642710102780 is an apocalyptic number.

It is an amenable number.

642710102780 is an abundant number, since it is smaller than the sum of its proper divisors (707538247972).

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

642710102780 is a wasteful number, since it uses less digits than its factorization.

642710102780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265125 (or 13265123 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 642710102780 in words is "six hundred forty-two billion, seven hundred ten million, one hundred two thousand, seven hundred eighty".