261514645353419 has 2 divisors, whose sum is σ = 261514645353420. Its totient is φ = 261514645353418.

The previous prime is 261514645353317. The next prime is 261514645353431. The reversal of 261514645353419 is 914353546415162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261514645353419 - 2³⁶ = 261445925876683 is a prime.

It is a super-2 number, since 2×261514645353419² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261514645353719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130757322676709 + 130757322676710.

It is an arithmetic number, because the mean of its divisors is an integer number (130757322676710).

Almost surely, 2^{261514645353419} is an apocalyptic number.

261514645353419 is a deficient number, since it is larger than the sum of its proper divisors (1).

261514645353419 is an equidigital number, since it uses as much as digits as its factorization.

261514645353419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656000, while the sum is 59.

The spelling of 261514645353419 in words is "two hundred sixty-one trillion, five hundred fourteen billion, six hundred forty-five million, three hundred fifty-three thousand, four hundred nineteen".