80885691 has 6 divisors (see below), whose sum is σ = 116834900. Its totient is φ = 53923788.

The previous prime is 80885659. The next prime is 80885713. The reversal of 80885691 is 19658808.

80885691 is a `hidden beast` number, since 8 + 0 + 88 + 569 + 1 = 666.

It is not a de Polignac number, because 80885691 - 2⁵ = 80885659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80885621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4493641 + ... + 4493658.

Almost surely, 2^80885691 is an apocalyptic number.

80885691 is a deficient number, since it is larger than the sum of its proper divisors (35949209).

80885691 is a wasteful number, since it uses less digits than its factorization.

80885691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987305 (or 8987302 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 80885691 is about 8993.6472579260. The cubic root of 80885691 is about 432.4712418091.

The spelling of 80885691 in words is "eighty million, eight hundred eighty-five thousand, six hundred ninety-one".