185580221442 has 96 divisors (see below), whose sum is σ = 472222820160. Its totient is φ = 48078414720.

The previous prime is 185580221399. The next prime is 185580221461. The reversal of 185580221442 is 244122085581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 185580221394 and 185580221403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1184268 + ... + 1331784.

It is an arithmetic number, because the mean of its divisors is an integer number (4918987710).

Almost surely, 2^185580221442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185580221442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236111410080).

185580221442 is an abundant number, since it is smaller than the sum of its proper divisors (286642598718).

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

185580221442 is a wasteful number, since it uses less digits than its factorization.

185580221442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147936 (or 147929 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 42.

The spelling of 185580221442 in words is "one hundred eighty-five billion, five hundred eighty million, two hundred twenty-one thousand, four hundred forty-two".