80951559 has 16 divisors (see below), whose sum is σ = 121293312. Its totient is φ = 47649888.

The previous prime is 80951543. The next prime is 80951561. The reversal of 80951559 is 95515908.

It is a happy number.

It is not a de Polignac number, because 80951559 - 2⁴ = 80951543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80951559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80951539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44227 + ... + 46020.

It is an arithmetic number, because the mean of its divisors is an integer number (7580832).

Almost surely, 2^80951559 is an apocalyptic number.

80951559 is a deficient number, since it is larger than the sum of its proper divisors (40341753).

80951559 is a wasteful number, since it uses less digits than its factorization.

80951559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90286.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 80951559 is about 8997.3084308586. The cubic root of 80951559 is about 432.5886020266.

The spelling of 80951559 in words is "eighty million, nine hundred fifty-one thousand, five hundred fifty-nine".