79786578942 has 96 divisors (see below), whose sum is σ = 202337740800. Its totient is φ = 22248399744.

The previous prime is 79786578931. The next prime is 79786578953. The reversal of 79786578942 is 24987568797.

79786578942 is a `hidden beast` number, since 7 + 9 + 7 + 8 + 6 + 578 + 9 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (79786578931) and next prime (79786578953).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2107234 + ... + 2144762.

It is an arithmetic number, because the mean of its divisors is an integer number (2107684800).

Almost surely, 2^79786578942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79786578942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101168870400).

79786578942 is an abundant number, since it is smaller than the sum of its proper divisors (122551161858).

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

79786578942 is a wasteful number, since it uses less digits than its factorization.

79786578942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37950 (or 37947 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 72.

The spelling of 79786578942 in words is "seventy-nine billion, seven hundred eighty-six million, five hundred seventy-eight thousand, nine hundred forty-two".