135690244689 has 4 divisors (see below), whose sum is σ = 180920326256. Its totient is φ = 90460163124.

The previous prime is 135690244663. The next prime is 135690244693. The reversal of 135690244689 is 986442096531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135690244689 - 2¹² = 135690240593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135690244489) 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, 22615040779 + ... + 22615040784.

It is an arithmetic number, because the mean of its divisors is an integer number (45230081564).

Almost surely, 2^135690244689 is an apocalyptic number.

It is an amenable number.

135690244689 is a deficient number, since it is larger than the sum of its proper divisors (45230081567).

135690244689 is an equidigital number, since it uses as much as digits as its factorization.

135690244689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45230081566.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 135690244689 in words is "one hundred thirty-five billion, six hundred ninety million, two hundred forty-four thousand, six hundred eighty-nine".