82513891139 has 4 divisors (see below), whose sum is σ = 85359197760. Its totient is φ = 79668584520.

The previous prime is 82513891121. The next prime is 82513891157. The reversal of 82513891139 is 93119831528.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (82513891121) and next prime (82513891157).

It is a cyclic number.

It is not a de Polignac number, because 82513891139 - 2²⁰ = 82512842563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82513891169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1422653267 + ... + 1422653324.

It is an arithmetic number, because the mean of its divisors is an integer number (21339799440).

Almost surely, 2^82513891139 is an apocalyptic number.

82513891139 is a deficient number, since it is larger than the sum of its proper divisors (2845306621).

82513891139 is a wasteful number, since it uses less digits than its factorization.

82513891139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845306620.

The product of its digits is 466560, while the sum is 50.

It can be divided in two parts, 8251389 and 1139, that added together give a palindrome (8252528).

The spelling of 82513891139 in words is "eighty-two billion, five hundred thirteen million, eight hundred ninety-one thousand, one hundred thirty-nine".