997715690543 has 16 divisors (see below), whose sum is σ = 1172207039136. Its totient is φ = 837197130240.

The previous prime is 997715690537. The next prime is 997715690557. The reversal of 997715690543 is 345096517799.

997715690543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 997715690543 - 2³⁶ = 928996213807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997715690543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997715690513) 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, 2501771 + ... + 2873027.

It is an arithmetic number, because the mean of its divisors is an integer number (73262939946).

Almost surely, 2^997715690543 is an apocalyptic number.

997715690543 is a deficient number, since it is larger than the sum of its proper divisors (174491348593).

997715690543 is a wasteful number, since it uses less digits than its factorization.

997715690543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390074.

The product of its (nonzero) digits is 64297800, while the sum is 65.

The spelling of 997715690543 in words is "nine hundred ninety-seven billion, seven hundred fifteen million, six hundred ninety thousand, five hundred forty-three".