80078105899 has 4 divisors (see below), whose sum is σ = 87357933720. Its totient is φ = 72798278080.

The previous prime is 80078105897. The next prime is 80078105941. The reversal of 80078105899 is 99850187008.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 80078105899 - 2¹ = 80078105897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80078105893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3639913894 + ... + 3639913915.

It is an arithmetic number, because the mean of its divisors is an integer number (21839483430).

Almost surely, 2^80078105899 is an apocalyptic number.

80078105899 is a deficient number, since it is larger than the sum of its proper divisors (7279827821).

80078105899 is a wasteful number, since it uses less digits than its factorization.

80078105899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279827820.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 80078105899 in words is "eighty billion, seventy-eight million, one hundred five thousand, eight hundred ninety-nine".