185423985913 has 32 divisors (see below), whose sum is σ = 206254169856. Its totient is φ = 165801934848.

The previous prime is 185423985899. The next prime is 185423986031. The reversal of 185423985913 is 319589324581.

It is not a de Polignac number, because 185423985913 - 2²⁹ = 184887115001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185423985113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60142470 + ... + 60145552.

It is an arithmetic number, because the mean of its divisors is an integer number (6445442808).

Almost surely, 2^185423985913 is an apocalyptic number.

It is an amenable number.

185423985913 is a deficient number, since it is larger than the sum of its proper divisors (20830183943).

185423985913 is a wasteful number, since it uses less digits than its factorization.

185423985913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113.

The product of its digits is 9331200, while the sum is 58.

The spelling of 185423985913 in words is "one hundred eighty-five billion, four hundred twenty-three million, nine hundred eighty-five thousand, nine hundred thirteen".