13561716806387 has 8 divisors (see below), whose sum is σ = 13596580796256. Its totient is φ = 13526895728512.

The previous prime is 13561716806353. The next prime is 13561716806389. The reversal of 13561716806387 is 78360861716531.

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 13561716806387 - 2¹⁶ = 13561716740851 is a prime.

It is a super-2 number, since 2×13561716806387² (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 (13561716806389) 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, 10095068 + ... + 11359305.

It is an arithmetic number, because the mean of its divisors is an integer number (1699572599532).

Almost surely, 2^{13561716806387} is an apocalyptic number.

13561716806387 is a deficient number, since it is larger than the sum of its proper divisors (34863989869).

13561716806387 is an equidigital number, since it uses as much as digits as its factorization.

13561716806387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21455997.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 13561716806387 in words is "thirteen trillion, five hundred sixty-one billion, seven hundred sixteen million, eight hundred six thousand, three hundred eighty-seven".