997543510422 has 32 divisors (see below), whose sum is σ = 2046744785664. Its totient is φ = 324006765600.

The previous prime is 997543510421. The next prime is 997543510433. The reversal of 997543510422 is 224015345799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997543510421) 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, 12696954 + ... + 12775277.

It is an arithmetic number, because the mean of its divisors is an integer number (63960774552).

Almost surely, 2^997543510422 is an apocalyptic number.

997543510422 is an abundant number, since it is smaller than the sum of its proper divisors (1049201275242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997543510422 is a wasteful number, since it uses less digits than its factorization.

997543510422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25472404.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 997543510422 in words is "nine hundred ninety-seven billion, five hundred forty-three million, five hundred ten thousand, four hundred twenty-two".