13831728545 has 4 divisors (see below), whose sum is σ = 16598074260. Its totient is φ = 11065382832.

The previous prime is 13831728541. The next prime is 13831728563. The reversal of 13831728545 is 54582713831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3564567616 + 10267160929 = 59704^2 + 101327^2 .

It is a cyclic number.

It is not a de Polignac number, because 13831728545 - 2² = 13831728541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13831728545.

It is not an unprimeable number, because it can be changed into a prime (13831728541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383172850 + ... + 1383172859.

It is an arithmetic number, because the mean of its divisors is an integer number (4149518565).

Almost surely, 2^13831728545 is an apocalyptic number.

It is an amenable number.

13831728545 is a deficient number, since it is larger than the sum of its proper divisors (2766345715).

13831728545 is an equidigital number, since it uses as much as digits as its factorization.

13831728545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766345714.

The product of its digits is 806400, while the sum is 47.

The spelling of 13831728545 in words is "thirteen billion, eight hundred thirty-one million, seven hundred twenty-eight thousand, five hundred forty-five".