1944100289521 has 12 divisors (see below), whose sum is σ = 2106852063132. Its totient is φ = 1793103189696.

The previous prime is 1944100289519. The next prime is 1944100289561. The reversal of 1944100289521 is 1259820014491.

It can be written as a sum of positive squares in 6 ways, for example, as 500257729521 + 1443842560000 = 707289^2 + 1201600^2 .

It is not a de Polignac number, because 1944100289521 - 2¹ = 1944100289519 is a prime.

It is a super-3 number, since 3×1944100289521³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1944100289561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4440726 + ... + 4858831.

It is an arithmetic number, because the mean of its divisors is an integer number (175571005261).

Almost surely, 2^{1944100289521} is an apocalyptic number.

It is an amenable number.

1944100289521 is a deficient number, since it is larger than the sum of its proper divisors (162751773611).

1944100289521 is a wasteful number, since it uses less digits than its factorization.

1944100289521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300820 (or 9300807 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 1944100289521 in words is "one trillion, nine hundred forty-four billion, one hundred million, two hundred eighty-nine thousand, five hundred twenty-one".