11323432561 has 8 divisors (see below), whose sum is σ = 12982679424. Its totient is φ = 9674589120.

The previous prime is 11323432537. The next prime is 11323432583. The reversal of 11323432561 is 16523432311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11323432561 - 2¹⁷ = 11323301489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323432511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598520 + ... + 2602873.

It is an arithmetic number, because the mean of its divisors is an integer number (1622834928).

Almost surely, 2^11323432561 is an apocalyptic number.

It is an amenable number.

11323432561 is a deficient number, since it is larger than the sum of its proper divisors (1659246863).

11323432561 is an equidigital number, since it uses as much as digits as its factorization.

11323432561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201711.

The product of its digits is 12960, while the sum is 31.

Adding to 11323432561 its reverse (16523432311), we get a palindrome (27846864872).

The spelling of 11323432561 in words is "eleven billion, three hundred twenty-three million, four hundred thirty-two thousand, five hundred sixty-one".