13549897511387 has 4 divisors (see below), whose sum is σ = 13674208497840. Its totient is φ = 13425586524936.

The previous prime is 13549897511377. The next prime is 13549897511393. The reversal of 13549897511387 is 78311579894531.

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 13549897511387 - 2²⁶ = 13549830402523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13549897511387.

It is not an unprimeable number, because it can be changed into a prime (13549897511377) 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, 62155493063 + ... + 62155493280.

It is an arithmetic number, because the mean of its divisors is an integer number (3418552124460).

Almost surely, 2^{13549897511387} is an apocalyptic number.

13549897511387 is a deficient number, since it is larger than the sum of its proper divisors (124310986453).

13549897511387 is a wasteful number, since it uses less digits than its factorization.

13549897511387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124310986452.

The product of its digits is 228614400, while the sum is 71.

The spelling of 13549897511387 in words is "thirteen trillion, five hundred forty-nine billion, eight hundred ninety-seven million, five hundred eleven thousand, three hundred eighty-seven".