12694551320357 has 2 divisors, whose sum is σ = 12694551320358. Its totient is φ = 12694551320356.

The previous prime is 12694551320327. The next prime is 12694551320369. The reversal of 12694551320357 is 75302315549621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8335918065601 + 4358633254756 = 2887199^2 + 2087734^2 .

It is a cyclic number.

It is not a de Polignac number, because 12694551320357 - 2¹² = 12694551316261 is a prime.

It is a super-2 number, since 2×12694551320357² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12694551320299 and 12694551320308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12694551320327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347275660178 + 6347275660179.

It is an arithmetic number, because the mean of its divisors is an integer number (6347275660179).

Almost surely, 2^{12694551320357} is an apocalyptic number.

It is an amenable number.

12694551320357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694551320357 is an equidigital number, since it uses as much as digits as its factorization.

12694551320357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 53.

Adding to 12694551320357 its reverse (75302315549621), we get a palindrome (87996866869978).

The spelling of 12694551320357 in words is "twelve trillion, six hundred ninety-four billion, five hundred fifty-one million, three hundred twenty thousand, three hundred fifty-seven".