80511687591 has 16 divisors (see below), whose sum is σ = 115526900448. Its totient is φ = 49688985600.

The previous prime is 80511687587. The next prime is 80511687631. The reversal of 80511687591 is 19578611508.

It is not a de Polignac number, because 80511687591 - 2² = 80511687587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80511687551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12936730 + ... + 12942951.

It is an arithmetic number, because the mean of its divisors is an integer number (7220431278).

Almost surely, 2^80511687591 is an apocalyptic number.

80511687591 is a deficient number, since it is larger than the sum of its proper divisors (35015212857).

80511687591 is a wasteful number, since it uses less digits than its factorization.

80511687591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25879762.

The product of its (nonzero) digits is 604800, while the sum is 51.

The spelling of 80511687591 in words is "eighty billion, five hundred eleven million, six hundred eighty-seven thousand, five hundred ninety-one".