78809316930 has 80 divisors (see below), whose sum is σ = 218745356544. Its totient is φ = 20337881760.

The previous prime is 78809316923. The next prime is 78809316931. The reversal of 78809316930 is 3961390887.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (78809316931) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1544172 + ... + 1594391.

Almost surely, 2^78809316930 is an apocalyptic number.

78809316930 is an abundant number, since it is smaller than the sum of its proper divisors (139936039614).

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

78809316930 is a wasteful number, since it uses less digits than its factorization.

78809316930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138613 (or 3138604 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 78809316930 in words is "seventy-eight billion, eight hundred nine million, three hundred sixteen thousand, nine hundred thirty".