80691511776 has 48 divisors (see below), whose sum is σ = 212596892928. Its totient is φ = 26797910400.

The previous prime is 80691511757. The next prime is 80691511781. The reversal of 80691511776 is 67711519608.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×80691511776² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524790 + ... + 1576821.

It is an arithmetic number, because the mean of its divisors is an integer number (4429101936).

Almost surely, 2^80691511776 is an apocalyptic number.

It is an amenable number.

80691511776 is an abundant number, since it is smaller than the sum of its proper divisors (131905381152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80691511776 is a wasteful number, since it uses less digits than its factorization.

80691511776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101895 (or 3101887 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 80691511776 in words is "eighty billion, six hundred ninety-one million, five hundred eleven thousand, seven hundred seventy-six".