23564330849 has 2 divisors, whose sum is σ = 23564330850. Its totient is φ = 23564330848.

The previous prime is 23564330791. The next prime is 23564330891. The reversal of 23564330849 is 94803346532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11931629824 + 11632701025 = 109232^2 + 107855^2 .

It is a cyclic number.

It is not a de Polignac number, because 23564330849 - 2²⁴ = 23547553633 is a prime.

It is a super-2 number, since 2×23564330849² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23564330899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11782165424 + 11782165425.

It is an arithmetic number, because the mean of its divisors is an integer number (11782165425).

Almost surely, 2^23564330849 is an apocalyptic number.

It is an amenable number.

23564330849 is a deficient number, since it is larger than the sum of its proper divisors (1).

23564330849 is an equidigital number, since it uses as much as digits as its factorization.

23564330849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 23564330849 in words is "twenty-three billion, five hundred sixty-four million, three hundred thirty thousand, eight hundred forty-nine".