82502775805 has 4 divisors (see below), whose sum is σ = 99003330972. Its totient is φ = 66002220640.

The previous prime is 82502775767. The next prime is 82502775833. The reversal of 82502775805 is 50857720528.

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 55906710916 + 26596064889 = 236446^2 + 163083^2 .

It is not a de Polignac number, because 82502775805 - 2²³ = 82494387197 is a prime.

It is a Duffinian number.

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, 8250277576 + ... + 8250277585.

It is an arithmetic number, because the mean of its divisors is an integer number (24750832743).

Almost surely, 2^82502775805 is an apocalyptic number.

It is an amenable number.

82502775805 is a deficient number, since it is larger than the sum of its proper divisors (16500555167).

82502775805 is a wasteful number, since it uses less digits than its factorization.

82502775805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16500555166.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The spelling of 82502775805 in words is "eighty-two billion, five hundred two million, seven hundred seventy-five thousand, eight hundred five".