82381965377 has 2 divisors, whose sum is σ = 82381965378. Its totient is φ = 82381965376.

The previous prime is 82381965349. The next prime is 82381965397. The reversal of 82381965377 is 77356918328.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51329886721 + 31052078656 = 226561^2 + 176216^2 .

It is a cyclic number.

It is not a de Polignac number, because 82381965377 - 2⁶ = 82381965313 is a prime.

It is not a weakly prime, because it can be changed into another prime (82381965397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41190982688 + 41190982689.

It is an arithmetic number, because the mean of its divisors is an integer number (41190982689).

Almost surely, 2^82381965377 is an apocalyptic number.

It is an amenable number.

82381965377 is a deficient number, since it is larger than the sum of its proper divisors (1).

82381965377 is an equidigital number, since it uses as much as digits as its factorization.

82381965377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The spelling of 82381965377 in words is "eighty-two billion, three hundred eighty-one million, nine hundred sixty-five thousand, three hundred seventy-seven".