1720244420272 has 80 divisors (see below), whose sum is σ = 3992084490240. Its totient is φ = 702113677056.

The previous prime is 1720244420269. The next prime is 1720244420327. The reversal of 1720244420272 is 2720244420271.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 868168 + ... + 2047975.

It is an arithmetic number, because the mean of its divisors is an integer number (49901056128).

Almost surely, 2^{1720244420272} is an apocalyptic number.

It is an amenable number.

1720244420272 is an abundant number, since it is smaller than the sum of its proper divisors (2271840069968).

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

1720244420272 is a wasteful number, since it uses less digits than its factorization.

1720244420272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916410 (or 2916404 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 37.

Subtracting 1720244420272 from its reverse (2720244420271), we obtain a palindrome (999999999999).

The spelling of 1720244420272 in words is "one trillion, seven hundred twenty billion, two hundred forty-four million, four hundred twenty thousand, two hundred seventy-two".