108567251432721 has 15 divisors (see below), whose sum is σ = 162180849015691. Its totient is φ = 72378105104448.

The previous prime is 108567251432711. The next prime is 108567251432771. The reversal of 108567251432721 is 127234152765801.

The square root of 108567251432721 is 10419561.

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

108567251432721 is a `hidden beast` number, since 1 + 0 + 8 + 5 + 6 + 72 + 514 + 32 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 106179855618321 + 2387395814400 = 10304361^2 + 1545120^2 .

It is not a de Polignac number, because 108567251432721 - 2³¹ = 108565103949073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108567251432711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 93197185 + ... + 94354913.

Almost surely, 2^{108567251432721} is an apocalyptic number.

108567251432721 is the 10419561-st square number.

108567251432721 is the 5209781-st centered octagonal number.

It is an amenable number.

108567251432721 is a deficient number, since it is larger than the sum of its proper divisors (53613597582970).

108567251432721 is an frugal number, since it uses more digits than its factorization.

108567251432721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315470 (or 1157732 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 108567251432721 in words is "one hundred eight trillion, five hundred sixty-seven billion, two hundred fifty-one million, four hundred thirty-two thousand, seven hundred twenty-one".