13506691287 has 8 divisors (see below), whose sum is σ = 18012527104. Its totient is φ = 9002658168.

The previous prime is 13506691207. The next prime is 13506691321. The reversal of 13506691287 is 78219660531.

13506691287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13506691287 - 2¹⁶ = 13506625751 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 (13506691207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433093 + ... + 463230.

It is an arithmetic number, because the mean of its divisors is an integer number (2251565888).

Almost surely, 2^13506691287 is an apocalyptic number.

13506691287 is a deficient number, since it is larger than the sum of its proper divisors (4505835817).

13506691287 is an equidigital number, since it uses as much as digits as its factorization.

13506691287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901349.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 13506691287 in words is "thirteen billion, five hundred six million, six hundred ninety-one thousand, two hundred eighty-seven".