15593345243281 has 27 divisors (see below), whose sum is σ = 17081958553779. Its totient is φ = 14227958439552.

The previous prime is 15593345243263. The next prime is 15593345243353. The reversal of 15593345243281 is 18234254339551.

The square root of 15593345243281 is 3948841.

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

It can be written as a sum of positive squares in 13 ways, for example, as 10502726305681 + 5090618937600 = 3240791^2 + 2256240^2 .

It is not a de Polignac number, because 15593345243281 - 2¹¹ = 15593345241233 is a prime.

It is a super-2 number, since 2×15593345243281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15593345243251) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4568807331 + ... + 4568810743.

Almost surely, 2^{15593345243281} is an apocalyptic number.

15593345243281 is the 3948841-st square number.

15593345243281 is the 1974421-st centered octagonal number.

It is an amenable number.

15593345243281 is a deficient number, since it is larger than the sum of its proper divisors (1488613310498).

15593345243281 is an frugal number, since it uses more digits than its factorization.

15593345243281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7030 (or 3515 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 55.

The spelling of 15593345243281 in words is "fifteen trillion, five hundred ninety-three billion, three hundred forty-five million, two hundred forty-three thousand, two hundred eighty-one".