11535839961 has 4 divisors (see below), whose sum is σ = 15381119952. Its totient is φ = 7690559972.

The previous prime is 11535839947. The next prime is 11535839969. The reversal of 11535839961 is 16993853511.

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 11535839961 - 2¹¹ = 11535837913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11535839969) 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, 1922639991 + ... + 1922639996.

It is an arithmetic number, because the mean of its divisors is an integer number (3845279988).

Almost surely, 2^11535839961 is an apocalyptic number.

It is an amenable number.

11535839961 is a deficient number, since it is larger than the sum of its proper divisors (3845279991).

11535839961 is an equidigital number, since it uses as much as digits as its factorization.

11535839961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845279990.

The product of its digits is 874800, while the sum is 51.

The spelling of 11535839961 in words is "eleven billion, five hundred thirty-five million, eight hundred thirty-nine thousand, nine hundred sixty-one".