23278078715669 has 2 divisors, whose sum is σ = 23278078715670. Its totient is φ = 23278078715668.

The previous prime is 23278078715621. The next prime is 23278078715767. The reversal of 23278078715669 is 96651787087232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21833779511569 + 1444299204100 = 4672663^2 + 1201790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23278078715669 is a prime.

It is a super-2 number, since 2×23278078715669² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23278078715569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11639039357834 + 11639039357835.

It is an arithmetic number, because the mean of its divisors is an integer number (11639039357835).

Almost surely, 2^{23278078715669} is an apocalyptic number.

It is an amenable number.

23278078715669 is a deficient number, since it is larger than the sum of its proper divisors (1).

23278078715669 is an equidigital number, since it uses as much as digits as its factorization.

23278078715669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 426746880, while the sum is 71.

The spelling of 23278078715669 in words is "twenty-three trillion, two hundred seventy-eight billion, seventy-eight million, seven hundred fifteen thousand, six hundred sixty-nine".