22400144646 has 96 divisors (see below), whose sum is σ = 50047455744. Its totient is φ = 6628406400.

The previous prime is 22400144633. The next prime is 22400144647. The reversal of 22400144646 is 64644100422.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400144647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48380211 + ... + 48380673.

It is an arithmetic number, because the mean of its divisors is an integer number (521327664).

Almost surely, 2^22400144646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22400144646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25023727872).

22400144646 is an abundant number, since it is smaller than the sum of its proper divisors (27647311098).

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

22400144646 is a wasteful number, since it uses less digits than its factorization.

22400144646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The spelling of 22400144646 in words is "twenty-two billion, four hundred million, one hundred forty-four thousand, six hundred forty-six".