18161782231622 has 8 divisors (see below), whose sum is σ = 27242694305400. Its totient is φ = 9080884129824.

The previous prime is 18161782231511. The next prime is 18161782231639. The reversal of 18161782231622 is 22613228716181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823529 + ... + 6082907.

It is an arithmetic number, because the mean of its divisors is an integer number (3405336788175).

Almost surely, 2^{18161782231622} is an apocalyptic number.

18161782231622 is a deficient number, since it is larger than the sum of its proper divisors (9080912073778).

18161782231622 is a wasteful number, since it uses less digits than its factorization.

18161782231622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985990.

The product of its digits is 774144, while the sum is 50.

The spelling of 18161782231622 in words is "eighteen trillion, one hundred sixty-one billion, seven hundred eighty-two million, two hundred thirty-one thousand, six hundred twenty-two".