82861394425 has 6 divisors (see below), whose sum is σ = 102748129118. Its totient is φ = 66289115520.

The previous prime is 82861394423. The next prime is 82861394443. The reversal of 82861394425 is 52449316828.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5008675984 + 77852718441 = 70772^2 + 279021^2 .

It is not a de Polignac number, because 82861394425 - 2¹ = 82861394423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82861394423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1657227864 + ... + 1657227913.

Almost surely, 2^82861394425 is an apocalyptic number.

It is an amenable number.

82861394425 is a deficient number, since it is larger than the sum of its proper divisors (19886734693).

82861394425 is a wasteful number, since it uses less digits than its factorization.

82861394425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314455787 (or 3314455782 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 82861394425 in words is "eighty-two billion, eight hundred sixty-one million, three hundred ninety-four thousand, four hundred twenty-five".