78042490806 has 24 divisors (see below), whose sum is σ = 181568244600. Its totient is φ = 22297854432.

The previous prime is 78042490789. The next prime is 78042490859. The reversal of 78042490806 is 60809424087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132725031 + ... + 132725618.

It is an arithmetic number, because the mean of its divisors is an integer number (7565343525).

Almost surely, 2^78042490806 is an apocalyptic number.

78042490806 is an abundant number, since it is smaller than the sum of its proper divisors (103525753794).

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

78042490806 is a wasteful number, since it uses less digits than its factorization.

78042490806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265450668 (or 265450661 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 78042490806 in words is "seventy-eight billion, forty-two million, four hundred ninety thousand, eight hundred six".