19049244361 has 9 divisors (see below), whose sum is σ = 22160448999. Its totient is φ = 16327095624.

The previous prime is 19049244353. The next prime is 19049244367. The reversal of 19049244361 is 16344294091.

The square root of 19049244361 is 138019.

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., 1188525625 + 17860718736 = 34475^2 + 133644^2 .

It is not a de Polignac number, because 19049244361 - 2³ = 19049244353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19049244367) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 956275 + ... + 975991.

It is an arithmetic number, because the mean of its divisors is an integer number (2462272111).

Almost surely, 2^19049244361 is an apocalyptic number.

19049244361 is the 138019-th square number.

19049244361 is the 69010-th centered octagonal number.

It is an amenable number.

19049244361 is a deficient number, since it is larger than the sum of its proper divisors (3111204638).

19049244361 is an frugal number, since it uses more digits than its factorization.

19049244361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39448 (or 19724 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 19049244361 in words is "nineteen billion, forty-nine million, two hundred forty-four thousand, three hundred sixty-one".