80785639271 has 16 divisors (see below), whose sum is σ = 85683549600. Its totient is φ = 76035700608.

The previous prime is 80785639267. The next prime is 80785639303. The reversal of 80785639271 is 17293658708.

It is a cyclic number.

It is not a de Polignac number, because 80785639271 - 2² = 80785639267 is a prime.

It is a super-2 number, since 2×80785639271² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80785639241) 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, 571085 + ... + 698361.

It is an arithmetic number, because the mean of its divisors is an integer number (5355221850).

Almost surely, 2^80785639271 is an apocalyptic number.

80785639271 is a deficient number, since it is larger than the sum of its proper divisors (4897910329).

80785639271 is a wasteful number, since it uses less digits than its factorization.

80785639271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127858.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 80785639271 in words is "eighty billion, seven hundred eighty-five million, six hundred thirty-nine thousand, two hundred seventy-one".