1722939761664 has 495 divisors, whose sum is σ = 5521269306865. Its totient is φ = 517482577920.

The previous prime is 1722939761633. The next prime is 1722939761671. The reversal of 1722939761664 is 4661679392271.

The square root of 1722939761664 is 1312608.

It is a perfect power (a square), and thus also a powerful number.

1722939761664 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 9 + 3 + 9 + 7 + 616 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30359577600 + 1692580184064 = 174240^2 + 1300992^2 .

It is a super-2 number, since 2×1722939761664² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 15247254472 + ... + 15247254584.

Almost surely, 2^{1722939761664} is an apocalyptic number.

1722939761664 is the 1312608-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1722939761664

1722939761664 is an abundant number, since it is smaller than the sum of its proper divisors (3798329545201).

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

1722939761664 is an frugal number, since it uses more digits than its factorization.

1722939761664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 129 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 1722939761664 in words is "one trillion, seven hundred twenty-two billion, nine hundred thirty-nine million, seven hundred sixty-one thousand, six hundred sixty-four".