181890734682 has 16 divisors (see below), whose sum is σ = 363787440192. Its totient is φ = 60629249760.

The previous prime is 181890734639. The next prime is 181890734687. The reversal of 181890734682 is 286437098181.

It is a super-2 number, since 2×181890734682² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (181890734687) 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 7 ways as a sum of consecutive naturals, for example, 213243 + ... + 639729.

It is an arithmetic number, because the mean of its divisors is an integer number (22736715012).

Almost surely, 2^181890734682 is an apocalyptic number.

It is a pronic number, being equal to 426486×426487.

181890734682 is an abundant number, since it is smaller than the sum of its proper divisors (181896705510).

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

181890734682 is a wasteful number, since it uses less digits than its factorization.

181890734682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497573.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 181890734682 in words is "one hundred eighty-one billion, eight hundred ninety million, seven hundred thirty-four thousand, six hundred eighty-two".