1787216049424 has 135 divisors (see below), whose sum is σ = 3838076937477. Its totient is φ = 805842640512.

The previous prime is 1787216049407. The next prime is 1787216049497. The reversal of 1787216049424 is 4249406127871.

The square root of 1787216049424 is 1336868.

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

It can be written as a sum of positive squares in only one way, i.e., 264381072400 + 1522834977024 = 514180^2 + 1234032^2 .

It is a super-2 number, since 2×1787216049424² (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 26 ways as a sum of consecutive naturals, for example, 3267305119 + ... + 3267305665.

Almost surely, 2^{1787216049424} is an apocalyptic number.

1787216049424 is the 1336868-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1787216049424

1787216049424 is an abundant number, since it is smaller than the sum of its proper divisors (2050860888053).

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

1787216049424 is an frugal number, since it uses more digits than its factorization.

1787216049424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 1787216049424 in words is "one trillion, seven hundred eighty-seven billion, two hundred sixteen million, forty-nine thousand, four hundred twenty-four".