82563499657 has 4 divisors (see below), whose sum is σ = 82564163856. Its totient is φ = 82562835460.

The previous prime is 82563499651. The next prime is 82563499673. The reversal of 82563499657 is 75699436528.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 82563499657 - 2³ = 82563499649 is a prime.

It is a super-2 number, since 2×82563499657² (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 (82563499651) 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, 83719 + ... + 414892.

It is an arithmetic number, because the mean of its divisors is an integer number (20641040964).

Almost surely, 2^82563499657 is an apocalyptic number.

It is an amenable number.

82563499657 is a deficient number, since it is larger than the sum of its proper divisors (664199).

82563499657 is a wasteful number, since it uses less digits than its factorization.

82563499657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664198.

The product of its digits is 97977600, while the sum is 64.

The spelling of 82563499657 in words is "eighty-two billion, five hundred sixty-three million, four hundred ninety-nine thousand, six hundred fifty-seven".