997543510442 has 8 divisors (see below), whose sum is σ = 1584333810756. Its totient is φ = 469432240192.

The previous prime is 997543510433. The next prime is 997543510463. The reversal of 997543510442 is 244015345799.

It is a Cunningham number, because it is equal to 998771²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 997543510441 + 1 = 998771^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14669757473 + ... + 14669757540.

Almost surely, 2^997543510442 is an apocalyptic number.

997543510442 is a deficient number, since it is larger than the sum of its proper divisors (586790300314).

997543510442 is a wasteful number, since it uses less digits than its factorization.

997543510442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29339515032.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 997543510442 in words is "nine hundred ninety-seven billion, five hundred forty-three million, five hundred ten thousand, four hundred forty-two".