83399181577 has 2 divisors, whose sum is σ = 83399181578. Its totient is φ = 83399181576.

The previous prime is 83399181511. The next prime is 83399181583. The reversal of 83399181577 is 77518199338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48542664976 + 34856516601 = 220324^2 + 186699^2 .

It is a cyclic number.

It is not a de Polignac number, because 83399181577 - 2³¹ = 81251697929 is a prime.

It is not a weakly prime, because it can be changed into another prime (83399181377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41699590788 + 41699590789.

It is an arithmetic number, because the mean of its divisors is an integer number (41699590789).

Almost surely, 2^83399181577 is an apocalyptic number.

It is an amenable number.

83399181577 is a deficient number, since it is larger than the sum of its proper divisors (1).

83399181577 is an equidigital number, since it uses as much as digits as its factorization.

83399181577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 61.

The spelling of 83399181577 in words is "eighty-three billion, three hundred ninety-nine million, one hundred eighty-one thousand, five hundred seventy-seven".