82402789565 has 4 divisors (see below), whose sum is σ = 98883347484. Its totient is φ = 65922231648.

The previous prime is 82402789559. The next prime is 82402789591. The reversal of 82402789565 is 56598720428.

It is a happy number.

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 52522555684 + 29880233881 = 229178^2 + 172859^2 .

It is a cyclic number.

It is not a de Polignac number, because 82402789565 - 2¹⁶ = 82402724029 is a prime.

It is a super-3 number, since 3×82402789565³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82402789565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8240278952 + ... + 8240278961.

It is an arithmetic number, because the mean of its divisors is an integer number (24720836871).

Almost surely, 2^82402789565 is an apocalyptic number.

It is an amenable number.

82402789565 is a deficient number, since it is larger than the sum of its proper divisors (16480557919).

82402789565 is a wasteful number, since it uses less digits than its factorization.

82402789565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480557918.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 82402789565 in words is "eighty-two billion, four hundred two million, seven hundred eighty-nine thousand, five hundred sixty-five".