22729756128 has 48 divisors (see below), whose sum is σ = 60420890880. Its totient is φ = 7480676736.

The previous prime is 22729756123. The next prime is 22729756139. The reversal of 22729756128 is 82165792722.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729756123) 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, 1490950 + ... + 1506117.

It is an arithmetic number, because the mean of its divisors is an integer number (1258768560).

Almost surely, 2^22729756128 is an apocalyptic number.

It is an amenable number.

22729756128 is an abundant number, since it is smaller than the sum of its proper divisors (37691134752).

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

22729756128 is a wasteful number, since it uses less digits than its factorization.

22729756128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997159 (or 2997151 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The spelling of 22729756128 in words is "twenty-two billion, seven hundred twenty-nine million, seven hundred fifty-six thousand, one hundred twenty-eight".