23664064091 has 4 divisors (see below), whose sum is σ = 23664803400. Its totient is φ = 23663324784.

The previous prime is 23664064087. The next prime is 23664064103. The reversal of 23664064091 is 19046046632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23664064091 - 2² = 23664064087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23664064001) 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, 319361 + ... + 386418.

It is an arithmetic number, because the mean of its divisors is an integer number (5916200850).

Almost surely, 2^23664064091 is an apocalyptic number.

23664064091 is a deficient number, since it is larger than the sum of its proper divisors (739309).

23664064091 is an equidigital number, since it uses as much as digits as its factorization.

23664064091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739308.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 23664064091 in words is "twenty-three billion, six hundred sixty-four million, sixty-four thousand, ninety-one".