11573562541 has 4 divisors (see below), whose sum is σ = 11573803584. Its totient is φ = 11573321500.

The previous prime is 11573562523. The next prime is 11573562547. The reversal of 11573562541 is 14526537511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14526537511 = 8527 ⋅1703593.

It is a cyclic number.

It is not a de Polignac number, because 11573562541 - 2⁹ = 11573562029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11573562494 and 11573562503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11573562547) 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, 21235 + ... + 153616.

It is an arithmetic number, because the mean of its divisors is an integer number (2893450896).

Almost surely, 2^11573562541 is an apocalyptic number.

It is an amenable number.

11573562541 is a deficient number, since it is larger than the sum of its proper divisors (241043).

11573562541 is an equidigital number, since it uses as much as digits as its factorization.

11573562541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241042.

The product of its digits is 126000, while the sum is 40.

The spelling of 11573562541 in words is "eleven billion, five hundred seventy-three million, five hundred sixty-two thousand, five hundred forty-one".