12308458781 has 2 divisors, whose sum is σ = 12308458782. Its totient is φ = 12308458780.

The previous prime is 12308458753. The next prime is 12308458787. The reversal of 12308458781 is 18785480321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10086184900 + 2222273881 = 100430^2 + 47141^2 .

It is a cyclic number.

It is not a de Polignac number, because 12308458781 - 2²² = 12304264477 is a prime.

It is a super-2 number, since 2×12308458781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12308458787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154229390 + 6154229391.

It is an arithmetic number, because the mean of its divisors is an integer number (6154229391).

Almost surely, 2^12308458781 is an apocalyptic number.

It is an amenable number.

12308458781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12308458781 is an equidigital number, since it uses as much as digits as its factorization.

12308458781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 12308458781 in words is "twelve billion, three hundred eight million, four hundred fifty-eight thousand, seven hundred eighty-one".