22156738560 has 408 divisors, whose sum is σ = 83914799904. Its totient is φ = 5363466240.

The previous prime is 22156738553. The next prime is 22156738589. The reversal of 22156738560 is 6583765122.

22156738560 is a `hidden beast` number, since 2 + 2 + 1 + 56 + 7 + 38 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32439979 + ... + 32440661.

Almost surely, 2^22156738560 is an apocalyptic number.

22156738560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156738560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41957399952).

22156738560 is an abundant number, since it is smaller than the sum of its proper divisors (61758061344).

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

22156738560 is an equidigital number, since it uses as much as digits as its factorization.

22156738560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 22156738560 in words is "twenty-two billion, one hundred fifty-six million, seven hundred thirty-eight thousand, five hundred sixty".