11573707728 has 160 divisors (see below), whose sum is σ = 34819200000. Its totient is φ = 3275596800.

The previous prime is 11573707703. The next prime is 11573707777. The reversal of 11573707728 is 82770737511.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 704148 + ... + 720396.

It is an arithmetic number, because the mean of its divisors is an integer number (217620000).

Almost surely, 2^11573707728 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 11573707728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17409600000).

11573707728 is an abundant number, since it is smaller than the sum of its proper divisors (23245492272).

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

11573707728 is a wasteful number, since it uses less digits than its factorization.

11573707728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16361 (or 16355 counting only the distinct ones).

The product of its (nonzero) digits is 576240, while the sum is 48.

The spelling of 11573707728 in words is "eleven billion, five hundred seventy-three million, seven hundred seven thousand, seven hundred twenty-eight".