78776366472 has 192 divisors, whose sum is σ = 227084981760. Its totient is φ = 24629529600.

The previous prime is 78776366447. The next prime is 78776366491. The reversal of 78776366472 is 27466367787.

It is a happy 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, 14364643 + ... + 14370125.

It is an arithmetic number, because the mean of its divisors is an integer number (1182734280).

Almost surely, 2^78776366472 is an apocalyptic number.

78776366472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78776366472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113542490880).

78776366472 is an abundant number, since it is smaller than the sum of its proper divisors (148308615288).

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

78776366472 is a wasteful number, since it uses less digits than its factorization.

78776366472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724 (or 5717 counting only the distinct ones).

The product of its digits is 99574272, while the sum is 63.

The spelling of 78776366472 in words is "seventy-eight billion, seven hundred seventy-six million, three hundred sixty-six thousand, four hundred seventy-two".