997587579020 has 48 divisors (see below), whose sum is σ = 2201589955488. Its totient is φ = 379221212160.

The previous prime is 997587579019. The next prime is 997587579031. The reversal of 997587579020 is 20975785799.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15643661 + ... + 15707300.

It is an arithmetic number, because the mean of its divisors is an integer number (45866457406).

Almost surely, 2^997587579020 is an apocalyptic number.

It is an amenable number.

997587579020 is an abundant number, since it is smaller than the sum of its proper divisors (1204002376468).

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

997587579020 is a wasteful number, since it uses less digits than its factorization.

997587579020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31351050 (or 31351048 counting only the distinct ones).

The product of its (nonzero) digits is 100018800, while the sum is 68.

The spelling of 997587579020 in words is "nine hundred ninety-seven billion, five hundred eighty-seven million, five hundred seventy-nine thousand, twenty".