22183742646 has 256 divisors, whose sum is σ = 58113780480. Its totient is φ = 6288482304.

The previous prime is 22183742641. The next prime is 22183742677. The reversal of 22183742646 is 64624738122.

It is a happy number.

22183742646 is a `hidden beast` number, since 2 + 2 + 18 + 374 + 264 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22183742641) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 51232446 + ... + 51232878.

It is an arithmetic number, because the mean of its divisors is an integer number (227006955).

Almost surely, 2^22183742646 is an apocalyptic number.

22183742646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22183742646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29056890240).

22183742646 is an abundant number, since it is smaller than the sum of its proper divisors (35930037834).

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

22183742646 is a wasteful number, since it uses less digits than its factorization.

22183742646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 521 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 22183742646 in words is "twenty-two billion, one hundred eighty-three million, seven hundred forty-two thousand, six hundred forty-six".