997506318263 has 8 divisors (see below), whose sum is σ = 1227700084128. Its totient is φ = 789235768224.

The previous prime is 997506318121. The next prime is 997506318283. The reversal of 997506318263 is 362813605799.

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

It is a cyclic number.

It is not a de Polignac number, because 997506318263 - 2²⁰ = 997505269687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997506318283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5480803856 + ... + 5480804037.

It is an arithmetic number, because the mean of its divisors is an integer number (153462510516).

Almost surely, 2^997506318263 is an apocalyptic number.

997506318263 is a deficient number, since it is larger than the sum of its proper divisors (230193765865).

997506318263 is a wasteful number, since it uses less digits than its factorization.

997506318263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961607913.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 997506318263 in words is "nine hundred ninety-seven billion, five hundred six million, three hundred eighteen thousand, two hundred sixty-three".