13105645261 has 4 divisors (see below), whose sum is σ = 13106574592. Its totient is φ = 13104715932.

The previous prime is 13105645247. The next prime is 13105645309. The reversal of 13105645261 is 16254650131.

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 a cyclic number.

It is not a de Polignac number, because 13105645261 - 2⁹ = 13105644749 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 (13105645061) 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, 443181 + ... + 471826.

It is an arithmetic number, because the mean of its divisors is an integer number (3276643648).

Almost surely, 2^13105645261 is an apocalyptic number.

It is an amenable number.

13105645261 is a deficient number, since it is larger than the sum of its proper divisors (929331).

13105645261 is an equidigital number, since it uses as much as digits as its factorization.

13105645261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929330.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 13105645261 in words is "thirteen billion, one hundred five million, six hundred forty-five thousand, two hundred sixty-one".