42243657978 has 16 divisors (see below), whose sum is σ = 84491348256. Its totient is φ = 14080547280.

The previous prime is 42243657959. The next prime is 42243658021. The reversal of 42243657978 is 87975634224.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22068 + ... + 291503.

It is an arithmetic number, because the mean of its divisors is an integer number (5280709266).

Almost surely, 2^42243657978 is an apocalyptic number.

42243657978 is an abundant number, since it is smaller than the sum of its proper divisors (42247690278).

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

42243657978 is a wasteful number, since it uses less digits than its factorization.

42243657978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336029.

The product of its digits is 20321280, while the sum is 57.

The spelling of 42243657978 in words is "forty-two billion, two hundred forty-three million, six hundred fifty-seven thousand, nine hundred seventy-eight".