181848821394 has 32 divisors (see below), whose sum is σ = 372783622464. Its totient is φ = 59106700800.

The previous prime is 181848821393. The next prime is 181848821443. The reversal of 181848821394 is 493128848181.

It is not an unprimeable number, because it can be changed into a prime (181848821393) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 441307 + ... + 747294.

It is an arithmetic number, because the mean of its divisors is an integer number (11649488202).

Almost surely, 2^181848821394 is an apocalyptic number.

181848821394 is an abundant number, since it is smaller than the sum of its proper divisors (190934801070).

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

181848821394 is a wasteful number, since it uses less digits than its factorization.

181848821394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189242.

The product of its digits is 3538944, while the sum is 57.

The spelling of 181848821394 in words is "one hundred eighty-one billion, eight hundred forty-eight million, eight hundred twenty-one thousand, three hundred ninety-four".