23278238617 has 2 divisors, whose sum is σ = 23278238618. Its totient is φ = 23278238616.

The previous prime is 23278238611. The next prime is 23278238623. The reversal of 23278238617 is 71683287232.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (23278238611) and next prime (23278238623).

It can be written as a sum of positive squares in only one way, i.e., 15527901321 + 7750337296 = 124611^2 + 88036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23278238617 is a prime.

It is a super-3 number, since 3×23278238617³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23278238611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11639119308 + 11639119309.

It is an arithmetic number, because the mean of its divisors is an integer number (11639119309).

Almost surely, 2^23278238617 is an apocalyptic number.

It is an amenable number.

23278238617 is a deficient number, since it is larger than the sum of its proper divisors (1).

23278238617 is an equidigital number, since it uses as much as digits as its factorization.

23278238617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The spelling of 23278238617 in words is "twenty-three billion, two hundred seventy-eight million, two hundred thirty-eight thousand, six hundred seventeen".