135211491609 has 8 divisors (see below), whose sum is σ = 184117776000. Its totient is φ = 88223100816.

The previous prime is 135211491593. The next prime is 135211491617. The reversal of 135211491609 is 906194112531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135211491609 - 2⁴ = 135211491593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135211491659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479473234 + ... + 479473515.

It is an arithmetic number, because the mean of its divisors is an integer number (23014722000).

Almost surely, 2^135211491609 is an apocalyptic number.

It is an amenable number.

135211491609 is a deficient number, since it is larger than the sum of its proper divisors (48906284391).

135211491609 is an equidigital number, since it uses as much as digits as its factorization.

135211491609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958946799.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 135211491609 in words is "one hundred thirty-five billion, two hundred eleven million, four hundred ninety-one thousand, six hundred nine".