13674752847721 has 27 divisors (see below), whose sum is σ = 15951480798981. Its totient is φ = 11688800593344.

The previous prime is 13674752847719. The next prime is 13674752847739. The reversal of 13674752847721 is 12774825747631.

The square root of 13674752847721 is 3697939.

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

It can be written as a sum of positive squares in 4 ways, for example, as 305228625625 + 13369524222096 = 552475^2 + 3656436^2 .

It is not a de Polignac number, because 13674752847721 - 2¹ = 13674752847719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13674752827721) 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, 16903278765 + ... + 16903279573.

Almost surely, 2^{13674752847721} is an apocalyptic number.

13674752847721 is the 3697939-th square number.

13674752847721 is the 1848970-th centered octagonal number.

It is an amenable number.

13674752847721 is a deficient number, since it is larger than the sum of its proper divisors (2276727951260).

13674752847721 is an frugal number, since it uses more digits than its factorization.

13674752847721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938 (or 1469 counting only the distinct ones).

The product of its digits is 110638080, while the sum is 64.

Multiplying 13674752847721 by its sum of digits (64), we get a square (875184182254144 = 29583512²).

The spelling of 13674752847721 in words is "thirteen trillion, six hundred seventy-four billion, seven hundred fifty-two million, eight hundred forty-seven thousand, seven hundred twenty-one".