23878361638913 has 2 divisors, whose sum is σ = 23878361638914. Its totient is φ = 23878361638912.

The previous prime is 23878361638853. The next prime is 23878361638933. The reversal of 23878361638913 is 31983616387832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16843735308544 + 7034626330369 = 4104112^2 + 2652287^2 .

It is a cyclic number.

It is not a de Polignac number, because 23878361638913 - 2¹⁸ = 23878361376769 is a prime.

It is not a weakly prime, because it can be changed into another prime (23878361638933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11939180819456 + 11939180819457.

It is an arithmetic number, because the mean of its divisors is an integer number (11939180819457).

Almost surely, 2^{23878361638913} is an apocalyptic number.

It is an amenable number.

23878361638913 is a deficient number, since it is larger than the sum of its proper divisors (1).

23878361638913 is an equidigital number, since it uses as much as digits as its factorization.

23878361638913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 68.

The spelling of 23878361638913 in words is "twenty-three trillion, eight hundred seventy-eight billion, three hundred sixty-one million, six hundred thirty-eight thousand, nine hundred thirteen".