78800428399 has 16 divisors (see below), whose sum is σ = 99711035136. Its totient is φ = 60486465600.

The previous prime is 78800428391. The next prime is 78800428417. The reversal of 78800428399 is 99382400887.

It is not a de Polignac number, because 78800428399 - 2³ = 78800428391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78800428391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7632022 + ... + 7642339.

It is an arithmetic number, because the mean of its divisors is an integer number (6231939696).

Almost surely, 2^78800428399 is an apocalyptic number.

78800428399 is a deficient number, since it is larger than the sum of its proper divisors (20910606737).

78800428399 is a wasteful number, since it uses less digits than its factorization.

78800428399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15274446.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 78800428399 in words is "seventy-eight billion, eight hundred million, four hundred twenty-eight thousand, three hundred ninety-nine".