185740161613 has 2 divisors, whose sum is σ = 185740161614. Its totient is φ = 185740161612.

The previous prime is 185740161559. The next prime is 185740161617. The reversal of 185740161613 is 316161047581.

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., 182002917924 + 3737243689 = 426618^2 + 61133^2 .

It is a cyclic number.

It is not a de Polignac number, because 185740161613 - 2²⁵ = 185706607181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 185740161613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185740161617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92870080806 + 92870080807.

It is an arithmetic number, because the mean of its divisors is an integer number (92870080807).

Almost surely, 2^185740161613 is an apocalyptic number.

It is an amenable number.

185740161613 is a deficient number, since it is larger than the sum of its proper divisors (1).

185740161613 is an equidigital number, since it uses as much as digits as its factorization.

185740161613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 185740161613 in words is "one hundred eighty-five billion, seven hundred forty million, one hundred sixty-one thousand, six hundred thirteen".