19294644849489 has 45 divisors (see below), whose sum is σ = 28913800570347. Its totient is φ = 12822641024256.

The previous prime is 19294644849463. The next prime is 19294644849523. The reversal of 19294644849489 is 98494844649291.

The square root of 19294644849489 is 4392567.

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

19294644849489 is a `hidden beast` number, since 1 + 9 + 2 + 9 + 4 + 6 + 4 + 48 + 494 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11791209071889 + 7503435777600 = 3433833^2 + 2739240^2 .

It is not a de Polignac number, because 19294644849489 - 2⁵ = 19294644849457 is a prime.

It is a super-2 number, since 2×19294644849489² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (19294644849589) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 17750362704 + ... + 17750363790.

Almost surely, 2^{19294644849489} is an apocalyptic number.

19294644849489 is the 4392567-th square number.

19294644849489 is the 2196284-th centered octagonal number.

It is an amenable number.

19294644849489 is a deficient number, since it is larger than the sum of its proper divisors (9619155720858).

19294644849489 is an frugal number, since it uses more digits than its factorization.

19294644849489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 1539 counting only the distinct ones).

The product of its digits is 5159780352, while the sum is 81.

19294644849489 divided by its sum of digits (81) gives a square (238205491969 = 488063²).

The spelling of 19294644849489 in words is "nineteen trillion, two hundred ninety-four billion, six hundred forty-four million, eight hundred forty-nine thousand, four hundred eighty-nine".