13065540510491 has 8 divisors (see below), whose sum is σ = 15581265702144. Its totient is φ = 10712120169960.

The previous prime is 13065540510481. The next prime is 13065540510493. The reversal of 13065540510491 is 19401504556031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13065540510491 - 2⁶ = 13065540510427 is a prime.

It is a super-2 number, since 2×13065540510491² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13065540510493) 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, 40576212605 + ... + 40576212926.

It is an arithmetic number, because the mean of its divisors is an integer number (1947658212768).

Almost surely, 2^{13065540510491} is an apocalyptic number.

13065540510491 is a deficient number, since it is larger than the sum of its proper divisors (2515725191653).

13065540510491 is an equidigital number, since it uses as much as digits as its factorization.

13065540510491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81152425561.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 13065540510491 in words is "thirteen trillion, sixty-five billion, five hundred forty million, five hundred ten thousand, four hundred ninety-one".