80916951091 has 4 divisors (see below), whose sum is σ = 81075924000. Its totient is φ = 80757978184.

The previous prime is 80916951083. The next prime is 80916951127. The reversal of 80916951091 is 19015961908.

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

It is a cyclic number.

It is not a de Polignac number, because 80916951091 - 2³ = 80916951083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80916951001) 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 3 ways as a sum of consecutive naturals, for example, 79485691 + ... + 79486708.

It is an arithmetic number, because the mean of its divisors is an integer number (20268981000).

Almost surely, 2^80916951091 is an apocalyptic number.

80916951091 is a deficient number, since it is larger than the sum of its proper divisors (158972909).

80916951091 is a wasteful number, since it uses less digits than its factorization.

80916951091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158972908.

The product of its (nonzero) digits is 174960, while the sum is 49.

The spelling of 80916951091 in words is "eighty billion, nine hundred sixteen million, nine hundred fifty-one thousand, ninety-one".