82581273287 has 4 divisors (see below), whose sum is σ = 83712523680. Its totient is φ = 81450022896.

The previous prime is 82581273259. The next prime is 82581273319. The reversal of 82581273287 is 78237218528.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82581273287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82581273227) 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, 565625087 + ... + 565625232.

It is an arithmetic number, because the mean of its divisors is an integer number (20928130920).

Almost surely, 2^82581273287 is an apocalyptic number.

82581273287 is a deficient number, since it is larger than the sum of its proper divisors (1131250393).

82581273287 is a wasteful number, since it uses less digits than its factorization.

82581273287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131250392.

The product of its digits is 3010560, while the sum is 53.

The spelling of 82581273287 in words is "eighty-two billion, five hundred eighty-one million, two hundred seventy-three thousand, two hundred eighty-seven".