82133778425 has 12 divisors (see below), whose sum is σ = 102434595180. Its totient is φ = 65327209920.

The previous prime is 82133778421. The next prime is 82133778443. The reversal of 82133778425 is 52487733128.

It can be written as a sum of positive squares in 6 ways, for example, as 12189926464 + 69943851961 = 110408^2 + 264469^2 .

It is not a de Polignac number, because 82133778425 - 2² = 82133778421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82133778421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9490910 + ... + 9499559.

It is an arithmetic number, because the mean of its divisors is an integer number (8536216265).

Almost surely, 2^82133778425 is an apocalyptic number.

It is an amenable number.

82133778425 is a deficient number, since it is larger than the sum of its proper divisors (20300816755).

82133778425 is a wasteful number, since it uses less digits than its factorization.

82133778425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18990652 (or 18990647 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The spelling of 82133778425 in words is "eighty-two billion, one hundred thirty-three million, seven hundred seventy-eight thousand, four hundred twenty-five".