80916566385 has 16 divisors (see below), whose sum is σ = 129470088384. Its totient is φ = 43154308032.

The previous prime is 80916566377. The next prime is 80916566411. The reversal of 80916566385 is 58366561908.

It is not a de Polignac number, because 80916566385 - 2³ = 80916566377 is a prime.

It is a super-2 number, since 2×80916566385² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877119 + ... + 964971.

It is an arithmetic number, because the mean of its divisors is an integer number (8091880524).

Almost surely, 2^80916566385 is an apocalyptic number.

It is an amenable number.

80916566385 is a deficient number, since it is larger than the sum of its proper divisors (48553521999).

80916566385 is a wasteful number, since it uses less digits than its factorization.

80916566385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149264.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 80916566385 in words is "eighty billion, nine hundred sixteen million, five hundred sixty-six thousand, three hundred eighty-five".