82257724169 has 4 divisors (see below), whose sum is σ = 87096413844. Its totient is φ = 77419034496.

The previous prime is 82257724151. The next prime is 82257724177. The reversal of 82257724169 is 96142775228.

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 76086050569 + 6171673600 = 275837^2 + 78560^2 .

It is a cyclic number.

It is not a de Polignac number, because 82257724169 - 2⁸ = 82257723913 is a prime.

It is a super-2 number, since 2×82257724169² (a number of 23 digits) contains 22 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 82257724169.

It is not an unprimeable number, because it can be changed into a prime (82257727169) 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, 2419344812 + ... + 2419344845.

It is an arithmetic number, because the mean of its divisors is an integer number (21774103461).

Almost surely, 2^82257724169 is an apocalyptic number.

It is an amenable number.

82257724169 is a deficient number, since it is larger than the sum of its proper divisors (4838689675).

82257724169 is a wasteful number, since it uses less digits than its factorization.

82257724169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838689674.

The product of its digits is 3386880, while the sum is 53.

The spelling of 82257724169 in words is "eighty-two billion, two hundred fifty-seven million, seven hundred twenty-four thousand, one hundred sixty-nine".