135867831643 has 4 divisors (see below), whose sum is σ = 135869817600. Its totient is φ = 135865845688.

The previous prime is 135867831563. The next prime is 135867831691. The reversal of 135867831643 is 346138768531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346138768531 = 309251 ⋅1119281.

It is a cyclic number.

It is not a de Polignac number, because 135867831643 - 2²⁹ = 135330960731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135867832643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886555 + ... + 1028452.

It is an arithmetic number, because the mean of its divisors is an integer number (33967454400).

Almost surely, 2^135867831643 is an apocalyptic number.

135867831643 is a deficient number, since it is larger than the sum of its proper divisors (1985957).

135867831643 is an equidigital number, since it uses as much as digits as its factorization.

135867831643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985956.

The product of its digits is 8709120, while the sum is 55.

The spelling of 135867831643 in words is "one hundred thirty-five billion, eight hundred sixty-seven million, eight hundred thirty-one thousand, six hundred forty-three".