717661404440772 has 48 divisors (see below), whose sum is σ = 1827263058297600. Its totient is φ = 217414989257760.

The previous prime is 717661404440731. The next prime is 717661404440777. The reversal of 717661404440772 is 277044404166717.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (717661404440777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726549622 + ... + 727536717.

It is an arithmetic number, because the mean of its divisors is an integer number (38067980381200).

Almost surely, 2^{717661404440772} is an apocalyptic number.

It is an amenable number.

717661404440772 is an abundant number, since it is smaller than the sum of its proper divisors (1109601653856828).

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

717661404440772 is a wasteful number, since it uses less digits than its factorization.

717661404440772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454090096 (or 1454090094 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 60.

The spelling of 717661404440772 in words is "seven hundred seventeen trillion, six hundred sixty-one billion, four hundred four million, four hundred forty thousand, seven hundred seventy-two".