23664648949 has 2 divisors, whose sum is σ = 23664648950. Its totient is φ = 23664648948.

The previous prime is 23664648937. The next prime is 23664648967. The reversal of 23664648949 is 94984646632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21283892100 + 2380756849 = 145890^2 + 48793^2 .

It is a cyclic number.

It is not a de Polignac number, because 23664648949 - 2⁹ = 23664648437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23664648649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832324474 + 11832324475.

It is an arithmetic number, because the mean of its divisors is an integer number (11832324475).

Almost surely, 2^23664648949 is an apocalyptic number.

It is an amenable number.

23664648949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23664648949 is an equidigital number, since it uses as much as digits as its factorization.

23664648949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53747712, while the sum is 61.

The spelling of 23664648949 in words is "twenty-three billion, six hundred sixty-four million, six hundred forty-eight thousand, nine hundred forty-nine".