135819649 has 16 divisors (see below), whose sum is σ = 161842176. Its totient is φ = 111528000.

The previous prime is 135819643. The next prime is 135819659. The reversal of 135819649 is 946918531.

It is a cyclic number.

It is not a de Polignac number, because 135819649 - 2³ = 135819641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135819599 and 135819608.

It is not an unprimeable number, because it can be changed into a prime (135819641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18819 + ... + 25015.

It is an arithmetic number, because the mean of its divisors is an integer number (10115136).

Almost surely, 2^135819649 is an apocalyptic number.

It is an amenable number.

135819649 is a deficient number, since it is larger than the sum of its proper divisors (26022527).

135819649 is a wasteful number, since it uses less digits than its factorization.

135819649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336.

The product of its digits is 233280, while the sum is 46.

The square root of 135819649 is about 11654.1687391251. The cubic root of 135819649 is about 514.0288973746.

The spelling of 135819649 in words is "one hundred thirty-five million, eight hundred nineteen thousand, six hundred forty-nine".