23643312149 has 2 divisors, whose sum is σ = 23643312150. Its totient is φ = 23643312148.

The previous prime is 23643312101. The next prime is 23643312151. The reversal of 23643312149 is 94121334632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22385545924 + 1257766225 = 149618^2 + 35465^2 .

It is a cyclic number.

It is not a de Polignac number, because 23643312149 - 2¹² = 23643308053 is a prime.

Together with 23643312151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23643312179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821656074 + 11821656075.

It is an arithmetic number, because the mean of its divisors is an integer number (11821656075).

Almost surely, 2^23643312149 is an apocalyptic number.

It is an amenable number.

23643312149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23643312149 is an equidigital number, since it uses as much as digits as its factorization.

23643312149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The spelling of 23643312149 in words is "twenty-three billion, six hundred forty-three million, three hundred twelve thousand, one hundred forty-nine".