12447868357 has 2 divisors, whose sum is σ = 12447868358. Its totient is φ = 12447868356.

The previous prime is 12447868337. The next prime is 12447868393. The reversal of 12447868357 is 75386874421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11533471236 + 914397121 = 107394^2 + 30239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12447868357 - 2⁷ = 12447868229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12447868298 and 12447868307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12447868337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223934178 + 6223934179.

It is an arithmetic number, because the mean of its divisors is an integer number (6223934179).

Almost surely, 2^12447868357 is an apocalyptic number.

It is an amenable number.

12447868357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447868357 is an equidigital number, since it uses as much as digits as its factorization.

12447868357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9031680, while the sum is 55.

The spelling of 12447868357 in words is "twelve billion, four hundred forty-seven million, eight hundred sixty-eight thousand, three hundred fifty-seven".