798687178249 has 9 divisors (see below), whose sum is σ = 827204645397. Its totient is φ = 771121217664.

The previous prime is 798687178243. The next prime is 798687178309. The reversal of 798687178249 is 942871786897.

The square root of 798687178249 is 893693.

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 224832447225 + 573854731024 = 474165^2 + 757532^2 .

It is not a de Polignac number, because 798687178249 - 2³ = 798687178241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (798687178241) 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 8 ways as a sum of consecutive naturals, for example, 25901689 + ... + 25932505.

Almost surely, 2^798687178249 is an apocalyptic number.

798687178249 is the 893693-rd square number.

798687178249 is the 446847-th centered octagonal number.

It is an amenable number.

798687178249 is a deficient number, since it is larger than the sum of its proper divisors (28517467148).

798687178249 is an frugal number, since it uses more digits than its factorization.

798687178249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61692 (or 30846 counting only the distinct ones).

The product of its digits is 682795008, while the sum is 76.

The spelling of 798687178249 in words is "seven hundred ninety-eight billion, six hundred eighty-seven million, one hundred seventy-eight thousand, two hundred forty-nine".