184993751881 has 9 divisors (see below), whose sum is σ = 185643335469. Its totient is φ = 184346437836.

The previous prime is 184993751879. The next prime is 184993751903. The reversal of 184993751881 is 188157399481.

The square root of 184993751881 is 430109.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 184993751881 - 2¹ = 184993751879 is a prime.

It is a super-2 number, since 2×184993751881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (184993751861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 164731186 + ... + 164732308.

Almost surely, 2^184993751881 is an apocalyptic number.

184993751881 is the 430109-th square number.

184993751881 is the 215055-th centered octagonal number.

It is an amenable number.

184993751881 is a deficient number, since it is larger than the sum of its proper divisors (649583588).

184993751881 is an frugal number, since it uses more digits than its factorization.

184993751881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 1506 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 64.

Multiplying 184993751881 by its sum of digits (64), we get a square (11839600120384 = 3440872²).

The spelling of 184993751881 in words is "one hundred eighty-four billion, nine hundred ninety-three million, seven hundred fifty-one thousand, eight hundred eighty-one".