80916946445 has 16 divisors (see below), whose sum is σ = 102446984640. Its totient is φ = 61184865024.

The previous prime is 80916946441. The next prime is 80916946447. The reversal of 80916946445 is 54464961908.

It is a cyclic number.

It is not a de Polignac number, because 80916946445 - 2² = 80916946441 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80916946441) 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, 942419 + ... + 1024688.

It is an arithmetic number, because the mean of its divisors is an integer number (6402936540).

Almost surely, 2^80916946445 is an apocalyptic number.

It is an amenable number.

80916946445 is a deficient number, since it is larger than the sum of its proper divisors (21530038195).

80916946445 is a wasteful number, since it uses less digits than its factorization.

80916946445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967564.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 80916946445 in words is "eighty billion, nine hundred sixteen million, nine hundred forty-six thousand, four hundred forty-five".