135935603999 has 4 divisors (see below), whose sum is σ = 146392188936. Its totient is φ = 125479019064.

The previous prime is 135935603981. The next prime is 135935604047. The reversal of 135935603999 is 999306539531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135935603999 - 2³² = 131640636703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135935603929) 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, 5228292449 + ... + 5228292474.

It is an arithmetic number, because the mean of its divisors is an integer number (36598047234).

Almost surely, 2^135935603999 is an apocalyptic number.

135935603999 is a deficient number, since it is larger than the sum of its proper divisors (10456584937).

135935603999 is a wasteful number, since it uses less digits than its factorization.

135935603999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456584936.

The product of its (nonzero) digits is 26572050, while the sum is 62.

The spelling of 135935603999 in words is "one hundred thirty-five billion, nine hundred thirty-five million, six hundred three thousand, nine hundred ninety-nine".