185221126164 has 24 divisors (see below), whose sum is σ = 432251985088. Its totient is φ = 61730467200.

The previous prime is 185221126117. The next prime is 185221126199. The reversal of 185221126164 is 461621122581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160437 + ... + 1310364.

Almost surely, 2^185221126164 is an apocalyptic number.

It is an amenable number.

185221126164 is an abundant number, since it is smaller than the sum of its proper divisors (247030858924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

185221126164 is a wasteful number, since it uses less digits than its factorization.

185221126164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477055 (or 2477053 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The spelling of 185221126164 in words is "one hundred eighty-five billion, two hundred twenty-one million, one hundred twenty-six thousand, one hundred sixty-four".