117572866321 has 3 divisors (see below), whose sum is σ = 117573209211. Its totient is φ = 117572523432.

The previous prime is 117572866291. The next prime is 117572866331. The reversal of 117572866321 is 123668275711.

The square root of 117572866321 is 342889.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1264584721 + 116308281600 = 35561^2 + 341040^2 .

It is not a de Polignac number, because 117572866321 - 2⁵ = 117572866289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117572866331) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 171445 + ... + 514333.

It is an arithmetic number, because the mean of its divisors is an integer number (39191069737).

Almost surely, 2^117572866321 is an apocalyptic number.

117572866321 is the 342889-th square number.

117572866321 is the 171445-th centered octagonal number.

It is an amenable number.

117572866321 is a deficient number, since it is larger than the sum of its proper divisors (342890).

117572866321 is an frugal number, since it uses more digits than its factorization.

117572866321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685778 (or 342889 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

Multiplying 117572866321 by its sum of digits (49), we get a square (5761070449729 = 2400223²).

The spelling of 117572866321 in words is "one hundred seventeen billion, five hundred seventy-two million, eight hundred sixty-six thousand, three hundred twenty-one".