22685077728 has 120 divisors (see below), whose sum is σ = 67126735368. Its totient is φ = 7515161856.

The previous prime is 22685077643. The next prime is 22685077777. The reversal of 22685077728 is 82777058622.

22685077728 is a `hidden beast` number, since 2 + 2 + 68 + 507 + 7 + 72 + 8 = 666.

It is a super-2 number, since 2×22685077728² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 395650 + ... + 449342.

Almost surely, 2^22685077728 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 22685077728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33563367684).

22685077728 is an abundant number, since it is smaller than the sum of its proper divisors (44441657640).

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

22685077728 is a wasteful number, since it uses less digits than its factorization.

22685077728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53878 (or 53861 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 22685077728 in words is "twenty-two billion, six hundred eighty-five million, seventy-seven thousand, seven hundred twenty-eight".