181841887922 has 6 divisors (see below), whose sum is σ = 272763736479. Its totient is φ = 90920642430.

The previous prime is 181841887907. The next prime is 181841887949. The reversal of 181841887922 is 229788148181.

It can be written as a sum of positive squares in only one way, i.e., 90920943961 + 90920943961 = 301531^2 + 301531^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=301531.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 452297 + ... + 753827.

Almost surely, 2^181841887922 is an apocalyptic number.

181841887922 is a deficient number, since it is larger than the sum of its proper divisors (90921848557).

181841887922 is an frugal number, since it uses more digits than its factorization.

181841887922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603064 (or 301533 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 59.

The spelling of 181841887922 in words is "one hundred eighty-one billion, eight hundred forty-one million, eight hundred eighty-seven thousand, nine hundred twenty-two".