12551366407061 has 2 divisors, whose sum is σ = 12551366407062. Its totient is φ = 12551366407060.

The previous prime is 12551366407049. The next prime is 12551366407087. The reversal of 12551366407061 is 16070466315521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12530077846225 + 21288560836 = 3539785^2 + 145906^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551366407061 - 2¹⁴ = 12551366390677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12551366406997 and 12551366407015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551366407001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275683203530 + 6275683203531.

It is an arithmetic number, because the mean of its divisors is an integer number (6275683203531).

Almost surely, 2^{12551366407061} is an apocalyptic number.

It is an amenable number.

12551366407061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551366407061 is an equidigital number, since it uses as much as digits as its factorization.

12551366407061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 12551366407061 in words is "twelve trillion, five hundred fifty-one billion, three hundred sixty-six million, four hundred seven thousand, sixty-one".