997534435799 has 16 divisors (see below), whose sum is σ = 1093941227520. Its totient is φ = 902093794560.

The previous prime is 997534435787. The next prime is 997534435817.

997534435799 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997534435799 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 (997534435769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284359 + ... + 1909095.

It is an arithmetic number, because the mean of its divisors is an integer number (68371326720).

Almost surely, 2^997534435799 is an apocalyptic number.

997534435799 is a deficient number, since it is larger than the sum of its proper divisors (96406791721).

997534435799 is a wasteful number, since it uses less digits than its factorization.

997534435799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625510.

The product of its digits is 1157360400, while the sum is 74.

The spelling of 997534435799 in words is "nine hundred ninety-seven billion, five hundred thirty-four million, four hundred thirty-five thousand, seven hundred ninety-nine".