78009317862 has 64 divisors (see below), whose sum is σ = 184610603520. Its totient is φ = 21501720576.

The previous prime is 78009317861. The next prime is 78009317909. The reversal of 78009317862 is 26871390087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78009317861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1455993 + ... + 1508619.

It is an arithmetic number, because the mean of its divisors is an integer number (2884540680).

Almost surely, 2^78009317862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78009317862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92305301760).

78009317862 is an abundant number, since it is smaller than the sum of its proper divisors (106601285658).

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

78009317862 is a wasteful number, since it uses less digits than its factorization.

78009317862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53885.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 78009317862 in words is "seventy-eight billion, nine million, three hundred seventeen thousand, eight hundred sixty-two".