22178743648 has 96 divisors (see below), whose sum is σ = 46051213824. Its totient is φ = 10501166592.

The previous prime is 22178743637. The next prime is 22178743651. The reversal of 22178743648 is 84634787122.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22178743595 and 22178743604.

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, 18684111 + ... + 18685297.

It is an arithmetic number, because the mean of its divisors is an integer number (479700144).

Almost surely, 2^22178743648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22178743648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23025606912).

22178743648 is an abundant number, since it is smaller than the sum of its proper divisors (23872470176).

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

22178743648 is a wasteful number, since it uses less digits than its factorization.

22178743648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1636 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 52.

The spelling of 22178743648 in words is "twenty-two billion, one hundred seventy-eight million, seven hundred forty-three thousand, six hundred forty-eight".