22406645744 has 80 divisors (see below), whose sum is σ = 51416518656. Its totient is φ = 9256550400.

The previous prime is 22406645741. The next prime is 22406645749. The reversal of 22406645744 is 44754660422.

It is a super-2 number, since 2×22406645744² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22406645695 and 22406645704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22406645741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879749 + ... + 904859.

Almost surely, 2^22406645744 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 22406645744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25708259328).

22406645744 is an abundant number, since it is smaller than the sum of its proper divisors (29009872912).

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

22406645744 is a wasteful number, since it uses less digits than its factorization.

22406645744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25414 (or 25408 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 44.

The spelling of 22406645744 in words is "twenty-two billion, four hundred six million, six hundred forty-five thousand, seven hundred forty-four".