1720149260544 has 720 divisors, whose sum is σ = 6220598275584. Its totient is φ = 465614438400.

The previous prime is 1720149260537. The next prime is 1720149260551. The reversal of 1720149260544 is 4450629410271.

1720149260544 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 1 + 49 + 2 + 60 + 544 = 666.

It is an interprime number because it is at equal distance from previous prime (1720149260537) and next prime (1720149260551).

It is a self number, because there is not a number n which added to its sum of digits gives 1720149260544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 91913332 + ... + 91932044.

Almost surely, 2^{1720149260544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720149260544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110299137792).

1720149260544 is an abundant number, since it is smaller than the sum of its proper divisors (4500449015040).

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

1720149260544 is a wasteful number, since it uses less digits than its factorization.

1720149260544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18796 (or 18773 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 1720149260544 in words is "one trillion, seven hundred twenty billion, one hundred forty-nine million, two hundred sixty thousand, five hundred forty-four".