11057320720 has 20 divisors (see below), whose sum is σ = 25708270860. Its totient is φ = 4422928256.

The previous prime is 11057320711. The next prime is 11057320739. The reversal of 11057320720 is 2702375011.

It can be written as a sum of positive squares in 2 ways, for example, as 4092416784 + 6964903936 = 63972^2 + 83456^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69108175 + ... + 69108334.

It is an arithmetic number, because the mean of its divisors is an integer number (1285413543).

Almost surely, 2^11057320720 is an apocalyptic number.

11057320720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11057320720 is an abundant number, since it is smaller than the sum of its proper divisors (14650950140).

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

11057320720 is a wasteful number, since it uses less digits than its factorization.

11057320720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138216522 (or 138216516 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

Adding to 11057320720 its reverse (2702375011), we get a palindrome (13759695731).

The spelling of 11057320720 in words is "eleven billion, fifty-seven million, three hundred twenty thousand, seven hundred twenty".