261347615713 has 2 divisors, whose sum is σ = 261347615714. Its totient is φ = 261347615712.

The previous prime is 261347615707. The next prime is 261347615777. The reversal of 261347615713 is 317516743162.

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., 246896690769 + 14450924944 = 496887^2 + 120212^2 .

It is a cyclic number.

It is not a de Polignac number, because 261347615713 - 2⁵ = 261347615681 is a prime.

It is not a weakly prime, because it can be changed into another prime (261347615213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130673807856 + 130673807857.

It is an arithmetic number, because the mean of its divisors is an integer number (130673807857).

Almost surely, 2^261347615713 is an apocalyptic number.

It is an amenable number.

261347615713 is a deficient number, since it is larger than the sum of its proper divisors (1).

261347615713 is an equidigital number, since it uses as much as digits as its factorization.

261347615713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

The spelling of 261347615713 in words is "two hundred sixty-one billion, three hundred forty-seven million, six hundred fifteen thousand, seven hundred thirteen".