80720940055 has 32 divisors (see below), whose sum is σ = 111568527360. Its totient is φ = 54919762560.

The previous prime is 80720940043. The next prime is 80720940059. The reversal of 80720940055 is 55004902708.

It is not a de Polignac number, because 80720940055 - 2⁹ = 80720939543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80720940059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3940690 + ... + 3961120.

It is an arithmetic number, because the mean of its divisors is an integer number (3486516480).

Almost surely, 2^80720940055 is an apocalyptic number.

80720940055 is a deficient number, since it is larger than the sum of its proper divisors (30847587305).

80720940055 is a wasteful number, since it uses less digits than its factorization.

80720940055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21319.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 80720940055 in words is "eighty billion, seven hundred twenty million, nine hundred forty thousand, fifty-five".