22178743646 has 16 divisors (see below), whose sum is σ = 35038998144. Its totient is φ = 10508089944.

The previous prime is 22178743637. The next prime is 22178743651. The reversal of 22178743646 is 64634787122.

It is a junction number, because it is equal to n+sod(n) for n = 22178743594 and 22178743603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2248100 + ... + 2257943.

It is an arithmetic number, because the mean of its divisors is an integer number (2189937384).

Almost surely, 2^22178743646 is an apocalyptic number.

22178743646 is a deficient number, since it is larger than the sum of its proper divisors (12860254498).

22178743646 is a wasteful number, since it uses less digits than its factorization.

22178743646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506175.

The product of its digits is 2709504, while the sum is 50.

The spelling of 22178743646 in words is "twenty-two billion, one hundred seventy-eight million, seven hundred forty-three thousand, six hundred forty-six".