13128565061 has 8 divisors (see below), whose sum is σ = 14091257304. Its totient is φ = 12187031040.

The previous prime is 13128564991. The next prime is 13128565097. The reversal of 13128565061 is 16056582131.

It can be written as a sum of positive squares in 4 ways, for example, as 3933672961 + 9194892100 = 62719^2 + 95890^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13128565061 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 (13128565861) 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, 5288270 + ... + 5290751.

It is an arithmetic number, because the mean of its divisors is an integer number (1761407163).

Almost surely, 2^13128565061 is an apocalyptic number.

It is an amenable number.

13128565061 is a deficient number, since it is larger than the sum of its proper divisors (962692243).

13128565061 is a wasteful number, since it uses less digits than its factorization.

13128565061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10579111.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 13128565061 in words is "thirteen billion, one hundred twenty-eight million, five hundred sixty-five thousand, sixty-one".