82646456691 has 4 divisors (see below), whose sum is σ = 110195275592. Its totient is φ = 55097637792.

The previous prime is 82646456681. The next prime is 82646456701. The reversal of 82646456691 is 19665464628.

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 (82646456681) and next prime (82646456701).

It is not a de Polignac number, because 82646456691 - 2¹⁹ = 82645932403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82646456611) 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, 13774409446 + ... + 13774409451.

It is an arithmetic number, because the mean of its divisors is an integer number (27548818898).

Almost surely, 2^82646456691 is an apocalyptic number.

82646456691 is a deficient number, since it is larger than the sum of its proper divisors (27548818901).

82646456691 is a wasteful number, since it uses less digits than its factorization.

82646456691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27548818900.

The product of its digits is 14929920, while the sum is 57.

The spelling of 82646456691 in words is "eighty-two billion, six hundred forty-six million, four hundred fifty-six thousand, six hundred ninety-one".