185009465213 has 4 divisors (see below), whose sum is σ = 185024988960. Its totient is φ = 184993941468.

The previous prime is 185009465131. The next prime is 185009465273. The reversal of 185009465213 is 312564900581.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 185009465213 - 2⁸ = 185009464957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185009465273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7743983 + ... + 7767836.

It is an arithmetic number, because the mean of its divisors is an integer number (46256247240).

Almost surely, 2^185009465213 is an apocalyptic number.

It is an amenable number.

185009465213 is a deficient number, since it is larger than the sum of its proper divisors (15523747).

185009465213 is a wasteful number, since it uses less digits than its factorization.

185009465213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15523746.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 185009465213 in words is "one hundred eighty-five billion, nine million, four hundred sixty-five thousand, two hundred thirteen".