82451422813 has 2 divisors, whose sum is σ = 82451422814. Its totient is φ = 82451422812.

The previous prime is 82451422799. The next prime is 82451422891. The reversal of 82451422813 is 31822415428.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56542657369 + 25908765444 = 237787^2 + 160962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82451422813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82451429813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41225711406 + 41225711407.

It is an arithmetic number, because the mean of its divisors is an integer number (41225711407).

Almost surely, 2^82451422813 is an apocalyptic number.

It is an amenable number.

82451422813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82451422813 is an equidigital number, since it uses as much as digits as its factorization.

82451422813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 40.

The spelling of 82451422813 in words is "eighty-two billion, four hundred fifty-one million, four hundred twenty-two thousand, eight hundred thirteen".