80121087999 has 48 divisors (see below), whose sum is σ = 119010091200. Its totient is φ = 51922944000.

The previous prime is 80121087961. The next prime is 80121088013. The reversal of 80121087999 is 99978012108.

It is a de Polignac number, because none of the positive numbers 2^k-80121087999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80121037999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42639342 + ... + 42641220.

It is an arithmetic number, because the mean of its divisors is an integer number (2479376900).

Almost surely, 2^80121087999 is an apocalyptic number.

80121087999 is a deficient number, since it is larger than the sum of its proper divisors (38889003201).

80121087999 is a wasteful number, since it uses less digits than its factorization.

80121087999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The spelling of 80121087999 in words is "eighty billion, one hundred twenty-one million, eighty-seven thousand, nine hundred ninety-nine".