82102864481 has 4 divisors (see below), whose sum is σ = 89566761264. Its totient is φ = 74638967700.

The previous prime is 82102864447. The next prime is 82102864561. The reversal of 82102864481 is 18446820128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-82102864481 is a prime.

It is a super-2 number, since 2×82102864481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82102864381) 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, 3731948375 + ... + 3731948396.

It is an arithmetic number, because the mean of its divisors is an integer number (22391690316).

Almost surely, 2^82102864481 is an apocalyptic number.

It is an amenable number.

82102864481 is a deficient number, since it is larger than the sum of its proper divisors (7463896783).

82102864481 is a wasteful number, since it uses less digits than its factorization.

82102864481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463896782.

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 82102864481 in words is "eighty-two billion, one hundred two million, eight hundred sixty-four thousand, four hundred eighty-one".