12459768557 has 2 divisors, whose sum is σ = 12459768558. Its totient is φ = 12459768556.

The previous prime is 12459768523. The next prime is 12459768577. The reversal of 12459768557 is 75586795421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10489651561 + 1970116996 = 102419^2 + 44386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12459768557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12459768496 and 12459768505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12459768577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6229884278 + 6229884279.

It is an arithmetic number, because the mean of its divisors is an integer number (6229884279).

Almost surely, 2^12459768557 is an apocalyptic number.

It is an amenable number.

12459768557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12459768557 is an equidigital number, since it uses as much as digits as its factorization.

12459768557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168000, while the sum is 59.

The spelling of 12459768557 in words is "twelve billion, four hundred fifty-nine million, seven hundred sixty-eight thousand, five hundred fifty-seven".