23332406561 has 4 divisors (see below), whose sum is σ = 23335376532. Its totient is φ = 23329436592.

The previous prime is 23332406549. The next prime is 23332406563. The reversal of 23332406561 is 16560423332.

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 3699072400 + 19633334161 = 60820^2 + 140119^2 .

It is a cyclic number.

It is not a de Polignac number, because 23332406561 - 2¹⁸ = 23332144417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23332406563) 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, 1473170 + ... + 1488923.

It is an arithmetic number, because the mean of its divisors is an integer number (5833844133).

Almost surely, 2^23332406561 is an apocalyptic number.

It is an amenable number.

23332406561 is a deficient number, since it is larger than the sum of its proper divisors (2969971).

23332406561 is an equidigital number, since it uses as much as digits as its factorization.

23332406561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969970.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 23332406561 its reverse (16560423332), we get a palindrome (39892829893).

The spelling of 23332406561 in words is "twenty-three billion, three hundred thirty-two million, four hundred six thousand, five hundred sixty-one".