717977809495020 has 48 divisors (see below), whose sum is σ = 2010364401977568. Its totient is φ = 191458222018560.

The previous prime is 717977809494989. The next prime is 717977809495057. The reversal of 717977809495020 is 20594908779717.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74388661 + ... + 83484300.

It is an arithmetic number, because the mean of its divisors is an integer number (41882591707866).

Almost surely, 2^{717977809495020} is an apocalyptic number.

It is an amenable number.

717977809495020 is an abundant number, since it is smaller than the sum of its proper divisors (1292386592482548).

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

717977809495020 is a wasteful number, since it uses less digits than its factorization.

717977809495020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157948770 (or 157948768 counting only the distinct ones).

The product of its (nonzero) digits is 560105280, while the sum is 75.

The spelling of 717977809495020 in words is "seven hundred seventeen trillion, nine hundred seventy-seven billion, eight hundred nine million, four hundred ninety-five thousand, twenty".