997750444143 has 32 divisors (see below), whose sum is σ = 1384748513280. Its totient is φ = 638499667680.

The previous prime is 997750444099. The next prime is 997750444153. The reversal of 997750444143 is 341444057799.

It is not a de Polignac number, because 997750444143 - 2⁶ = 997750444079 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997750444153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28927398 + ... + 28961868.

It is an arithmetic number, because the mean of its divisors is an integer number (43273391040).

Almost surely, 2^997750444143 is an apocalyptic number.

997750444143 is a deficient number, since it is larger than the sum of its proper divisors (386998069137).

997750444143 is a wasteful number, since it uses less digits than its factorization.

997750444143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38379.

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 997750444143 in words is "nine hundred ninety-seven billion, seven hundred fifty million, four hundred forty-four thousand, one hundred forty-three".