5261566401239 has 2 divisors, whose sum is σ = 5261566401240. Its totient is φ = 5261566401238.

The previous prime is 5261566401197. The next prime is 5261566401251. The reversal of 5261566401239 is 9321046651625.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5261566401239 - 2³² = 5257271433943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5261566431239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630783200619 + 2630783200620.

It is an arithmetic number, because the mean of its divisors is an integer number (2630783200620).

Almost surely, 2^{5261566401239} is an apocalyptic number.

5261566401239 is a deficient number, since it is larger than the sum of its proper divisors (1).

5261566401239 is an equidigital number, since it uses as much as digits as its factorization.

5261566401239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 5261566401239 in words is "five trillion, two hundred sixty-one billion, five hundred sixty-six million, four hundred one thousand, two hundred thirty-nine".