78699998792 has 16 divisors (see below), whose sum is σ = 147570908400. Its totient is φ = 39347756560.

The previous prime is 78699998759. The next prime is 78699998803. The reversal of 78699998792 is 29789999687.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78699998792.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126242 + ... + 416337.

It is an arithmetic number, because the mean of its divisors is an integer number (9223181775).

Almost surely, 2^78699998792 is an apocalyptic number.

It is an amenable number.

78699998792 is a deficient number, since it is larger than the sum of its proper divisors (68870909608).

78699998792 is a wasteful number, since it uses less digits than its factorization.

78699998792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560716 (or 560712 counting only the distinct ones).

The product of its digits is 2222131968, while the sum is 83.

The spelling of 78699998792 in words is "seventy-eight billion, six hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred ninety-two".