135899999999 has 4 divisors (see below), whose sum is σ = 143894117664. Its totient is φ = 127905882336.

The previous prime is 135899999947. The next prime is 135900000007. The reversal of 135899999999 is 999999998531.

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 135899999999 - 2³² = 131605032703 is a prime.

It is a Duffinian number.

135899999999 is a modest number, since divided by 999999 gives 135899 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135899999909) 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, 3997058807 + ... + 3997058840.

It is an arithmetic number, because the mean of its divisors is an integer number (35973529416).

Almost surely, 2^135899999999 is an apocalyptic number.

135899999999 is a deficient number, since it is larger than the sum of its proper divisors (7994117665).

135899999999 is an equidigital number, since it uses as much as digits as its factorization.

135899999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7994117664.

The product of its digits is 5165606520, while the sum is 89.

The spelling of 135899999999 in words is "one hundred thirty-five billion, eight hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".