78831290432 has 84 divisors (see below), whose sum is σ = 161617767696. Its totient is φ = 38129978880.

The previous prime is 78831290431. The next prime is 78831290437. The reversal of 78831290432 is 23409213887.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78831290431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32695307 + ... + 32697717.

It is an arithmetic number, because the mean of its divisors is an integer number (1924021044).

Almost surely, 2^78831290432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78831290432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80808883848).

78831290432 is an abundant number, since it is smaller than the sum of its proper divisors (82786477264).

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

78831290432 is a wasteful number, since it uses less digits than its factorization.

78831290432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 2565 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 78831290432 in words is "seventy-eight billion, eight hundred thirty-one million, two hundred ninety thousand, four hundred thirty-two".