135561670567 has 4 divisors (see below), whose sum is σ = 136425120856. Its totient is φ = 134698220280.

The previous prime is 135561670549. The next prime is 135561670579. The reversal of 135561670567 is 765076165531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765076165531 = 37397 ⋅20458223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135561670567 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 (135561670507) 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, 431724909 + ... + 431725222.

It is an arithmetic number, because the mean of its divisors is an integer number (34106280214).

Almost surely, 2^135561670567 is an apocalyptic number.

135561670567 is a deficient number, since it is larger than the sum of its proper divisors (863450289).

135561670567 is an equidigital number, since it uses as much as digits as its factorization.

135561670567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863450288.

The product of its (nonzero) digits is 3969000, while the sum is 52.

The spelling of 135561670567 in words is "one hundred thirty-five billion, five hundred sixty-one million, six hundred seventy thousand, five hundred sixty-seven".