23154372654449 has 2 divisors, whose sum is σ = 23154372654450. Its totient is φ = 23154372654448.

The previous prime is 23154372654421. The next prime is 23154372654461. The reversal of 23154372654449 is 94445627345132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12282396390625 + 10871976263824 = 3504625^2 + 3297268^2 .

It is a cyclic number.

It is not a de Polignac number, because 23154372654449 - 2⁴⁰ = 22054861026673 is a prime.

It is a super-2 number, since 2×23154372654449² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23154372654349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577186327224 + 11577186327225.

It is an arithmetic number, because the mean of its divisors is an integer number (11577186327225).

Almost surely, 2^{23154372654449} is an apocalyptic number.

It is an amenable number.

23154372654449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23154372654449 is an equidigital number, since it uses as much as digits as its factorization.

23154372654449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 59.

The spelling of 23154372654449 in words is "twenty-three trillion, one hundred fifty-four billion, three hundred seventy-two million, six hundred fifty-four thousand, four hundred forty-nine".