99178514063281 has 3 divisors (see below), whose sum is σ = 99178524022123. Its totient is φ = 99178504104440.

The previous prime is 99178514063273. The next prime is 99178514063311. The reversal of 99178514063281 is 18236041587199.

The square root of 99178514063281 is 9958841.

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., 341512840881 + 98837001222400 = 584391^2 + 9941680^2 .

It is not a de Polignac number, because 99178514063281 - 2³ = 99178514063273 is a prime.

It is a super-2 number, since 2×99178514063281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99178514063201) 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, 4979421 + ... + 14938261.

It is a 1-persistent number, because it is pandigital, but 2⋅99178514063281 = 198357028126562 is not.

Almost surely, 2^{99178514063281} is an apocalyptic number.

99178514063281 is the 9958841-st square number.

99178514063281 is the 4979421-st centered octagonal number.

It is an amenable number.

99178514063281 is a deficient number, since it is larger than the sum of its proper divisors (9958842).

99178514063281 is an frugal number, since it uses more digits than its factorization.

99178514063281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19917682 (or 9958841 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 99178514063281 in words is "ninety-nine trillion, one hundred seventy-eight billion, five hundred fourteen million, sixty-three thousand, two hundred eighty-one".