82774228251 has 72 divisors (see below), whose sum is σ = 137883259920. Its totient is φ = 43869133440.

The previous prime is 82774228241. The next prime is 82774228309. The reversal of 82774228251 is 15282247728.

It is not a de Polignac number, because 82774228251 - 2⁵ = 82774228219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82774228251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82774228241) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1679265 + ... + 1727853.

Almost surely, 2^82774228251 is an apocalyptic number.

82774228251 is a deficient number, since it is larger than the sum of its proper divisors (55109031669).

82774228251 is a wasteful number, since it uses less digits than its factorization.

82774228251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48665 (or 48635 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

The spelling of 82774228251 in words is "eighty-two billion, seven hundred seventy-four million, two hundred twenty-eight thousand, two hundred fifty-one".