135991846439 has 2 divisors, whose sum is σ = 135991846440. Its totient is φ = 135991846438.

The previous prime is 135991846351. The next prime is 135991846447. The reversal of 135991846439 is 934648199531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135991846439 - 2²⁰ = 135990797863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135991843439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67995923219 + 67995923220.

It is an arithmetic number, because the mean of its divisors is an integer number (67995923220).

Almost surely, 2^135991846439 is an apocalyptic number.

135991846439 is a deficient number, since it is larger than the sum of its proper divisors (1).

135991846439 is an equidigital number, since it uses as much as digits as its factorization.

135991846439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 62.

The spelling of 135991846439 in words is "one hundred thirty-five billion, nine hundred ninety-one million, eight hundred forty-six thousand, four hundred thirty-nine".