82765569 has 16 divisors (see below), whose sum is σ = 116877312. Its totient is φ = 51987408.

The previous prime is 82765549. The next prime is 82765589. The reversal of 82765569 is 96556728.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82765549) and next prime (82765589).

It is not a de Polignac number, because 82765569 - 2⁸ = 82765313 is a prime.

It is a super-2 number, since 2×82765569² = 13700278823787522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82765549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4329 + ... + 13574.

It is an arithmetic number, because the mean of its divisors is an integer number (7304832).

Almost surely, 2^82765569 is an apocalyptic number.

It is an amenable number.

82765569 is a deficient number, since it is larger than the sum of its proper divisors (34111743).

82765569 is a wasteful number, since it uses less digits than its factorization.

82765569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17996.

The product of its digits is 907200, while the sum is 48.

The square root of 82765569 is about 9097.5584087160. The cubic root of 82765569 is about 435.7959953081.

The spelling of 82765569 in words is "eighty-two million, seven hundred sixty-five thousand, five hundred sixty-nine".