13135605061 has 4 divisors (see below), whose sum is σ = 13490621452. Its totient is φ = 12780588672.

The previous prime is 13135605053. The next prime is 13135605079. The reversal of 13135605061 is 16050653131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16050653131 = 2287 ⋅7018213.

It can be written as a sum of positive squares in 2 ways, for example, as 5958296100 + 7177308961 = 77190^2 + 84719^2 .

It is a cyclic number.

It is not a de Polignac number, because 13135605061 - 2³ = 13135605053 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 (13135605661) 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, 177508140 + ... + 177508213.

It is an arithmetic number, because the mean of its divisors is an integer number (3372655363).

Almost surely, 2^13135605061 is an apocalyptic number.

It is an amenable number.

13135605061 is a deficient number, since it is larger than the sum of its proper divisors (355016391).

13135605061 is an equidigital number, since it uses as much as digits as its factorization.

13135605061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355016390.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 13135605061 in words is "thirteen billion, one hundred thirty-five million, six hundred five thousand, sixty-one".