11425235561 has 4 divisors (see below), whose sum is σ = 11426023824. Its totient is φ = 11424447300.

The previous prime is 11425235539. The next prime is 11425235639. The reversal of 11425235561 is 16553252411.

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.

It is a cyclic number.

It is not a de Polignac number, because 11425235561 - 2¹⁴ = 11425219177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11425235161) 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, 371975 + ... + 401516.

It is an arithmetic number, because the mean of its divisors is an integer number (2856505956).

Almost surely, 2^11425235561 is an apocalyptic number.

It is an amenable number.

11425235561 is a deficient number, since it is larger than the sum of its proper divisors (788263).

11425235561 is an equidigital number, since it uses as much as digits as its factorization.

11425235561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788262.

The product of its digits is 36000, while the sum is 35.

Adding to 11425235561 its reverse (16553252411), we get a palindrome (27978487972).

The spelling of 11425235561 in words is "eleven billion, four hundred twenty-five million, two hundred thirty-five thousand, five hundred sixty-one".