11553534520 has 64 divisors (see below), whose sum is σ = 28575296640. Its totient is φ = 4169193600.

The previous prime is 11553534479. The next prime is 11553534527. The reversal of 11553534520 is 2543535511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553534527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42582 + ... + 157861.

It is an arithmetic number, because the mean of its divisors is an integer number (446489010).

Almost surely, 2^11553534520 is an apocalyptic number.

11553534520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11553534520 is an abundant number, since it is smaller than the sum of its proper divisors (17021762120).

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

11553534520 is a wasteful number, since it uses less digits than its factorization.

11553534520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200596 (or 200592 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Subtracting from 11553534520 its reverse (2543535511), we obtain a palindrome (9009999009).

The spelling of 11553534520 in words is "eleven billion, five hundred fifty-three million, five hundred thirty-four thousand, five hundred twenty".