13567612061 has 4 divisors (see below), whose sum is σ = 13576088124. Its totient is φ = 13559136000.

The previous prime is 13567612013. The next prime is 13567612063. The reversal of 13567612061 is 16021676531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13327548025 + 240064036 = 115445^2 + 15494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13567612061 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 (13567612063) 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, 4235630 + ... + 4238831.

It is an arithmetic number, because the mean of its divisors is an integer number (3394022031).

Almost surely, 2^13567612061 is an apocalyptic number.

It is an amenable number.

13567612061 is a deficient number, since it is larger than the sum of its proper divisors (8476063).

13567612061 is an equidigital number, since it uses as much as digits as its factorization.

13567612061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8476062.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 13567612061 in words is "thirteen billion, five hundred sixty-seven million, six hundred twelve thousand, sixty-one".