181944427974 has 32 divisors (see below), whose sum is σ = 371662801920. Its totient is φ = 59352704832.

The previous prime is 181944427943. The next prime is 181944428011. The reversal of 181944427974 is 479724449181.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4784367 + ... + 4822245.

It is an arithmetic number, because the mean of its divisors is an integer number (11614462560).

Almost surely, 2^181944427974 is an apocalyptic number.

181944427974 is an abundant number, since it is smaller than the sum of its proper divisors (189718373946).

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

181944427974 is a wasteful number, since it uses less digits than its factorization.

181944427974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54964.

The product of its digits is 16257024, while the sum is 60.

The spelling of 181944427974 in words is "one hundred eighty-one billion, nine hundred forty-four million, four hundred twenty-seven thousand, nine hundred seventy-four".