185413946789 has 2 divisors, whose sum is σ = 185413946790. Its totient is φ = 185413946788.

The previous prime is 185413946749. The next prime is 185413946791. The reversal of 185413946789 is 987649314581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185183908900 + 230037889 = 430330^2 + 15167^2 .

It is a cyclic number.

It is not a de Polignac number, because 185413946789 - 2³² = 181118979493 is a prime.

Together with 185413946791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185413946749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92706973394 + 92706973395.

It is an arithmetic number, because the mean of its divisors is an integer number (92706973395).

Almost surely, 2^185413946789 is an apocalyptic number.

It is an amenable number.

185413946789 is a deficient number, since it is larger than the sum of its proper divisors (1).

185413946789 is an equidigital number, since it uses as much as digits as its factorization.

185413946789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 65.

The spelling of 185413946789 in words is "one hundred eighty-five billion, four hundred thirteen million, nine hundred forty-six thousand, seven hundred eighty-nine".