13539865471 has 4 divisors (see below), whose sum is σ = 14770762344. Its totient is φ = 12308968600.

The previous prime is 13539865459. The next prime is 13539865489. The reversal of 13539865471 is 17456893531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13539865471 - 2⁵ = 13539865439 is a prime.

It is a super-3 number, since 3×13539865471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539865411) 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, 615448420 + ... + 615448441.

It is an arithmetic number, because the mean of its divisors is an integer number (3692690586).

Almost surely, 2^13539865471 is an apocalyptic number.

13539865471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13539865471 is a deficient number, since it is larger than the sum of its proper divisors (1230896873).

13539865471 is a wasteful number, since it uses less digits than its factorization.

13539865471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230896872.

The product of its digits is 2721600, while the sum is 52.

The spelling of 13539865471 in words is "thirteen billion, five hundred thirty-nine million, eight hundred sixty-five thousand, four hundred seventy-one".