117553665321 has 27 divisors (see below), whose sum is σ = 177539047959. Its totient is φ = 74946671712.

The previous prime is 117553665301. The next prime is 117553665391. The reversal of 117553665321 is 123566355711.

The square root of 117553665321 is 342861.

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

117553665321 is a `hidden beast` number, since 1 + 1 + 7 + 5 + 53 + 66 + 532 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23697215721 + 93856449600 = 153939^2 + 306360^2 .

It is a de Polignac number, because none of the positive numbers 2^k-117553665321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117553665301) 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, 23654925 + ... + 23659893.

Almost surely, 2^117553665321 is an apocalyptic number.

117553665321 is the 342861-st square number.

117553665321 is the 171431-st centered octagonal number.

It is an amenable number.

117553665321 is a deficient number, since it is larger than the sum of its proper divisors (59985382638).

117553665321 is an frugal number, since it uses more digits than its factorization.

117553665321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990 (or 4995 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The spelling of 117553665321 in words is "one hundred seventeen billion, five hundred fifty-three million, six hundred sixty-five thousand, three hundred twenty-one".