11522020553 has 4 divisors (see below), whose sum is σ = 11599349700. Its totient is φ = 11444691408.

The previous prime is 11522020513. The next prime is 11522020561. The reversal of 11522020553 is 35502022511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6342051769 + 5179968784 = 79637^2 + 71972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11522020553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11522020513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38664350 + ... + 38664647.

It is an arithmetic number, because the mean of its divisors is an integer number (2899837425).

Almost surely, 2^11522020553 is an apocalyptic number.

It is an amenable number.

11522020553 is a deficient number, since it is larger than the sum of its proper divisors (77329147).

11522020553 is an equidigital number, since it uses as much as digits as its factorization.

11522020553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77329146.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 11522020553 in words is "eleven billion, five hundred twenty-two million, twenty thousand, five hundred fifty-three".