15399588941361 has 9 divisors (see below), whose sum is σ = 22243867698091. Its totient is φ = 10266384779112.

The previous prime is 15399588941339. The next prime is 15399588941411. The reversal of 15399588941361 is 16314988599351.

The square root of 15399588941361 is 3924231.

It is a perfect power (a square), and thus also a powerful number.

15399588941361 is a `hidden beast` number, since 1 + 5 + 3 + 9 + 9 + 588 + 9 + 4 + 1 + 36 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12402687845025 + 2996901096336 = 3521745^2 + 1731156^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 15399588941361 - 2¹¹ = 15399588939313 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 15399588941361.

It is not an unprimeable number, because it can be changed into a prime (15399588945361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11118655 + ... + 12426731.

Almost surely, 2^{15399588941361} is an apocalyptic number.

15399588941361 is the 3924231-st square number.

15399588941361 is the 1962116-th centered octagonal number.

It is an amenable number.

15399588941361 is a deficient number, since it is larger than the sum of its proper divisors (6844278756730).

15399588941361 is an frugal number, since it uses more digits than its factorization.

15399588941361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616160 (or 1308080 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 72.

The spelling of 15399588941361 in words is "fifteen trillion, three hundred ninety-nine billion, five hundred eighty-eight million, nine hundred forty-one thousand, three hundred sixty-one".