12588420278261 has 2 divisors, whose sum is σ = 12588420278262. Its totient is φ = 12588420278260.

The previous prime is 12588420278257. The next prime is 12588420278267. The reversal of 12588420278261 is 16287202488521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12588346576036 + 73702225 = 3548006^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12588420278261 - 2² = 12588420278257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12588420278197 and 12588420278206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12588420278267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6294210139130 + 6294210139131.

It is an arithmetic number, because the mean of its divisors is an integer number (6294210139131).

Almost surely, 2^{12588420278261} is an apocalyptic number.

It is an amenable number.

12588420278261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12588420278261 is an equidigital number, since it uses as much as digits as its factorization.

12588420278261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6881280, while the sum is 56.

The spelling of 12588420278261 in words is "twelve trillion, five hundred eighty-eight billion, four hundred twenty million, two hundred seventy-eight thousand, two hundred sixty-one".