717145900428 has 18 divisors (see below), whose sum is σ = 1673347279324. Its totient is φ = 239047655624.

The previous prime is 717145900423. The next prime is 717145900451. The reversal of 717145900428 is 824009541717.

It is not an unprimeable number, because it can be changed into a prime (717145900423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2811325 + ... + 3055787.

Almost surely, 2^717145900428 is an apocalyptic number.

It is an amenable number.

717145900428 is an abundant number, since it is smaller than the sum of its proper divisors (956201378896).

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

717145900428 is an frugal number, since it uses more digits than its factorization.

717145900428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488933 (or 244468 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

Multiplying 717145900428 by its sum of digits (48), we get a square (34423003220544 = 5867112²).

The spelling of 717145900428 in words is "seven hundred seventeen billion, one hundred forty-five million, nine hundred thousand, four hundred twenty-eight".