261252635419 has 2 divisors, whose sum is σ = 261252635420. Its totient is φ = 261252635418.

The previous prime is 261252635401. The next prime is 261252635467. The reversal of 261252635419 is 914536252162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261252635419 - 2³¹ = 259105151771 is a prime.

It is a super-2 number, since 2×261252635419² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261252635219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130626317709 + 130626317710.

It is an arithmetic number, because the mean of its divisors is an integer number (130626317710).

Almost surely, 2^261252635419 is an apocalyptic number.

261252635419 is a deficient number, since it is larger than the sum of its proper divisors (1).

261252635419 is an equidigital number, since it uses as much as digits as its factorization.

261252635419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The spelling of 261252635419 in words is "two hundred sixty-one billion, two hundred fifty-two million, six hundred thirty-five thousand, four hundred nineteen".