80688511 has 18 divisors (see below), whose sum is σ = 88334952. Its totient is φ = 73684800.

The previous prime is 80688499. The next prime is 80688541. The reversal of 80688511 is 11588608.

It is a de Polignac number, because none of the positive numbers 2^k-80688511 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80688541) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 534286 + ... + 534436.

Almost surely, 2^80688511 is an apocalyptic number.

80688511 is a deficient number, since it is larger than the sum of its proper divisors (7646441).

80688511 is a wasteful number, since it uses less digits than its factorization.

80688511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 80688511 is about 8982.6783867619. The cubic root of 80688511 is about 432.1195353226.

The spelling of 80688511 in words is "eighty million, six hundred eighty-eight thousand, five hundred eleven".