80851686636 has 48 divisors (see below), whose sum is σ = 215684985600. Its totient is φ = 23091858240.

The previous prime is 80851686631. The next prime is 80851686647. The reversal of 80851686636 is 63668615808.

It is not an unprimeable number, because it can be changed into a prime (80851686631) 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, 48406 + ... + 405026.

It is an arithmetic number, because the mean of its divisors is an integer number (4493437200).

Almost surely, 2^80851686636 is an apocalyptic number.

It is an amenable number.

80851686636 is an abundant number, since it is smaller than the sum of its proper divisors (134833298964).

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

80851686636 is a wasteful number, since it uses less digits than its factorization.

80851686636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359334 (or 359332 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 80851686636 in words is "eighty billion, eight hundred fifty-one million, six hundred eighty-six thousand, six hundred thirty-six".