74543072271889 has 9 divisors (see below), whose sum is σ = 80718359560209. Its totient is φ = 68808886183440.

The previous prime is 74543072271821. The next prime is 74543072271919. The reversal of 74543072271889 is 98817227034547.

The square root of 74543072271889 is 8633833.

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

It can be written as a sum of positive squares in 4 ways, for example, as 57583435140625 + 16959637131264 = 7588375^2 + 4118208^2 .

It is not a de Polignac number, because 74543072271889 - 2⁹ = 74543072271377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74543072271289) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 111907759 + ... + 112571899.

It is an arithmetic number, because the mean of its divisors is an integer number (8968706617801).

Almost surely, 2^{74543072271889} is an apocalyptic number.

74543072271889 is the 8633833-rd square number.

74543072271889 is the 4316917-th centered octagonal number.

It is an amenable number.

74543072271889 is a deficient number, since it is larger than the sum of its proper divisors (6175287288320).

74543072271889 is an frugal number, since it uses more digits than its factorization.

74543072271889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328308 (or 664154 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 67.

The spelling of 74543072271889 in words is "seventy-four trillion, five hundred forty-three billion, seventy-two million, two hundred seventy-one thousand, eight hundred eighty-nine".