991847247682 has 8 divisors (see below), whose sum is σ = 1575286805196. Its totient is φ = 466751645952.

The previous prime is 991847247647. The next prime is 991847247683. The reversal of 991847247682 is 286742748199.

It can be written as a sum of positive squares in 2 ways, for example, as 909484561561 + 82362686121 = 953669^2 + 286989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (991847247683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14585988903 + ... + 14585988970.

Almost surely, 2^991847247682 is an apocalyptic number.

991847247682 is a deficient number, since it is larger than the sum of its proper divisors (583439557514).

991847247682 is a wasteful number, since it uses less digits than its factorization.

991847247682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29171977892.

The product of its digits is 97542144, while the sum is 67.

The spelling of 991847247682 in words is "nine hundred ninety-one billion, eight hundred forty-seven million, two hundred forty-seven thousand, six hundred eighty-two".