83518418377 has 2 divisors, whose sum is σ = 83518418378. Its totient is φ = 83518418376.

The previous prime is 83518418327. The next prime is 83518418383. The reversal of 83518418377 is 77381481538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83485745721 + 32672656 = 288939^2 + 5716^2 .

It is a cyclic number.

It is not a de Polignac number, because 83518418377 - 2²³ = 83510029769 is a prime.

It is a super-2 number, since 2×83518418377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83518418327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41759209188 + 41759209189.

It is an arithmetic number, because the mean of its divisors is an integer number (41759209189).

Almost surely, 2^83518418377 is an apocalyptic number.

It is an amenable number.

83518418377 is a deficient number, since it is larger than the sum of its proper divisors (1).

83518418377 is an equidigital number, since it uses as much as digits as its factorization.

83518418377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 55.

The spelling of 83518418377 in words is "eighty-three billion, five hundred eighteen million, four hundred eighteen thousand, three hundred seventy-seven".