79905891824 has 40 divisors (see below), whose sum is σ = 168907878192. Its totient is φ = 36317445120.

The previous prime is 79905891823. The next prime is 79905891829. The reversal of 79905891824 is 42819850997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79905891823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528602 + ... + 3551174.

Almost surely, 2^79905891824 is an apocalyptic number.

It is an amenable number.

79905891824 is an abundant number, since it is smaller than the sum of its proper divisors (89001986368).

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

79905891824 is a wasteful number, since it uses less digits than its factorization.

79905891824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42705 (or 42699 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 79905891824 in words is "seventy-nine billion, nine hundred five million, eight hundred ninety-one thousand, eight hundred twenty-four".