82565515651 has 16 divisors (see below), whose sum is σ = 85801019584. Its totient is φ = 79385370624.

The previous prime is 82565515639. The next prime is 82565515657. The reversal of 82565515651 is 15651556528.

It is a cyclic number.

It is not a de Polignac number, because 82565515651 - 2⁷ = 82565515523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82565515595 and 82565515604.

It is not an unprimeable number, because it can be changed into a prime (82565515657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2398306 + ... + 2432488.

It is an arithmetic number, because the mean of its divisors is an integer number (5362563724).

Almost surely, 2^82565515651 is an apocalyptic number.

82565515651 is a deficient number, since it is larger than the sum of its proper divisors (3235503933).

82565515651 is a wasteful number, since it uses less digits than its factorization.

82565515651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34990.

The product of its digits is 1800000, while the sum is 49.

The spelling of 82565515651 in words is "eighty-two billion, five hundred sixty-five million, five hundred fifteen thousand, six hundred fifty-one".