717717631620 has 48 divisors (see below), whose sum is σ = 2192301131328. Its totient is φ = 173992152960.

The previous prime is 717717631607. The next prime is 717717631663. The reversal of 717717631620 is 26136717717.

717717631620 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 717717631620.

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, 543724819 + ... + 543726138.

It is an arithmetic number, because the mean of its divisors is an integer number (45672940236).

Almost surely, 2^717717631620 is an apocalyptic number.

It is an amenable number.

717717631620 is an abundant number, since it is smaller than the sum of its proper divisors (1474583499708).

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

717717631620 is a wasteful number, since it uses less digits than its factorization.

717717631620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087450980 (or 1087450978 counting only the distinct ones).

The product of its (nonzero) digits is 518616, while the sum is 48.

The spelling of 717717631620 in words is "seven hundred seventeen billion, seven hundred seventeen million, six hundred thirty-one thousand, six hundred twenty".