82806396457 has 4 divisors (see below), whose sum is σ = 82821239236. Its totient is φ = 82791553680.

The previous prime is 82806396427. The next prime is 82806396509. The reversal of 82806396457 is 75469360828.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57628323481 + 25178072976 = 240059^2 + 158676^2 .

It is a cyclic number.

It is not a de Polignac number, because 82806396457 - 2⁷ = 82806396329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82806396427) 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, 7413018 + ... + 7424179.

It is an arithmetic number, because the mean of its divisors is an integer number (20705309809).

Almost surely, 2^82806396457 is an apocalyptic number.

It is an amenable number.

82806396457 is a deficient number, since it is larger than the sum of its proper divisors (14842779).

82806396457 is a wasteful number, since it uses less digits than its factorization.

82806396457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14842778.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 82806396457 in words is "eighty-two billion, eight hundred six million, three hundred ninety-six thousand, four hundred fifty-seven".