22065617440 has 48 divisors (see below), whose sum is σ = 53927619480. Its totient is φ = 8521891840.

The previous prime is 22065617429. The next prime is 22065617447. The reversal of 22065617440 is 4471656022.

It can be written as a sum of positive squares in 4 ways, for example, as 20196957456 + 1868659984 = 142116^2 + 43228^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22065617440.

It is not an unprimeable number, because it can be changed into a prime (22065617447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2373121 + ... + 2382400.

Almost surely, 2^22065617440 is an apocalyptic number.

22065617440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22065617440 is an abundant number, since it is smaller than the sum of its proper divisors (31862002040).

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

22065617440 is a wasteful number, since it uses less digits than its factorization.

22065617440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755565 (or 4755557 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 22065617440 in words is "twenty-two billion, sixty-five million, six hundred seventeen thousand, four hundred forty".