78798104099 has 24 divisors (see below), whose sum is σ = 93699419904. Its totient is φ = 65686140000.

The previous prime is 78798104089. The next prime is 78798104131. The reversal of 78798104099 is 99040189787.

It is a Cunningham number, because it is equal to 280710²-1.

It is a de Polignac number, because none of the positive numbers 2^k-78798104099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78798104039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140354 + ... + 421064.

It is an arithmetic number, because the mean of its divisors is an integer number (3904142496).

Almost surely, 2^78798104099 is an apocalyptic number.

78798104099 is a deficient number, since it is larger than the sum of its proper divisors (14901315805).

78798104099 is a wasteful number, since it uses less digits than its factorization.

78798104099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280899 (or 280886 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 62.

The spelling of 78798104099 in words is "seventy-eight billion, seven hundred ninety-eight million, one hundred four thousand, ninety-nine".