13261453465561 has 8 divisors (see below), whose sum is σ = 15306005697984. Its totient is φ = 11254415953200.

The previous prime is 13261453465553. The next prime is 13261453465571. The reversal of 13261453465561 is 16556435416231.

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

It is not a de Polignac number, because 13261453465561 - 2³ = 13261453465553 is a prime.

It is a super-2 number, since 2×13261453465561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13261453465499 and 13261453465508.

It is not an unprimeable number, because it can be changed into a prime (13261453465511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9378679255 + ... + 9378680668.

It is an arithmetic number, because the mean of its divisors is an integer number (1913250712248).

Almost surely, 2^{13261453465561} is an apocalyptic number.

It is an amenable number.

13261453465561 is a deficient number, since it is larger than the sum of its proper divisors (2044552232423).

13261453465561 is a wasteful number, since it uses less digits than its factorization.

13261453465561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18757360031.

The product of its digits is 7776000, while the sum is 52.

The spelling of 13261453465561 in words is "thirteen trillion, two hundred sixty-one billion, four hundred fifty-three million, four hundred sixty-five thousand, five hundred sixty-one".