80695581 has 4 divisors (see below), whose sum is σ = 107594112. Its totient is φ = 53797052.

The previous prime is 80695553. The next prime is 80695591. The reversal of 80695581 is 18559608.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80695581 - 2²⁶ = 13586717 is a prime.

It is a super-2 number, since 2×80695581² = 13023553585855122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80695591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13449261 + ... + 13449266.

It is an arithmetic number, because the mean of its divisors is an integer number (26898528).

Almost surely, 2^80695581 is an apocalyptic number.

It is an amenable number.

80695581 is a deficient number, since it is larger than the sum of its proper divisors (26898531).

80695581 is a wasteful number, since it uses less digits than its factorization.

80695581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26898530.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 80695581 is about 8983.0719133268. The cubic root of 80695581 is about 432.1321558550.

The spelling of 80695581 in words is "eighty million, six hundred ninety-five thousand, five hundred eighty-one".