997263008542 has 4 divisors (see below), whose sum is σ = 1495894512816. Its totient is φ = 498631504270.

The previous prime is 997263008537. The next prime is 997263008591. The reversal of 997263008542 is 245800362799.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249315752134 + ... + 249315752137.

It is an arithmetic number, because the mean of its divisors is an integer number (373973628204).

Almost surely, 2^997263008542 is an apocalyptic number.

997263008542 is a deficient number, since it is larger than the sum of its proper divisors (498631504274).

997263008542 is a wasteful number, since it uses less digits than its factorization.

997263008542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498631504273.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 997263008542 in words is "nine hundred ninety-seven billion, two hundred sixty-three million, eight thousand, five hundred forty-two".