997507705799 has 64 divisors (see below), whose sum is σ = 1164691906560. Its totient is φ = 845793792000.

The previous prime is 997507705793. The next prime is 997507705813.

997507705799 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 997507705799 - 2²⁸ = 997239270343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997507705793) 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 63 ways as a sum of consecutive naturals, for example, 1020989999 + ... + 1020990975.

It is an arithmetic number, because the mean of its divisors is an integer number (18198311040).

Almost surely, 2^997507705799 is an apocalyptic number.

997507705799 is a deficient number, since it is larger than the sum of its proper divisors (167184200761).

997507705799 is a wasteful number, since it uses less digits than its factorization.

997507705799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its (nonzero) digits is 393824025, while the sum is 74.

The spelling of 997507705799 in words is "nine hundred ninety-seven billion, five hundred seven million, seven hundred five thousand, seven hundred ninety-nine".