23566651091 has 2 divisors, whose sum is σ = 23566651092. Its totient is φ = 23566651090.

The previous prime is 23566651063. The next prime is 23566651093. The reversal of 23566651091 is 19015666532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23566651091 - 2¹⁰ = 23566650067 is a prime.

Together with 23566651093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23566651093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11783325545 + 11783325546.

It is an arithmetic number, because the mean of its divisors is an integer number (11783325546).

Almost surely, 2^23566651091 is an apocalyptic number.

23566651091 is a deficient number, since it is larger than the sum of its proper divisors (1).

23566651091 is an equidigital number, since it uses as much as digits as its factorization.

23566651091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 23566651091 in words is "twenty-three billion, five hundred sixty-six million, six hundred fifty-one thousand, ninety-one".