19474481601 has 27 divisors (see below), whose sum is σ = 28396569513. Its totient is φ = 12861020160.

The previous prime is 19474481599. The next prime is 19474481629. The reversal of 19474481601 is 10618447491.

The square root of 19474481601 is 139551.

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

19474481601 is a `hidden beast` number, since 1 + 9 + 47 + 448 + 160 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7535025 + 19466946576 = 2745^2 + 139524^2 .

It is not a de Polignac number, because 19474481601 - 2¹ = 19474481599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19474481641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 75776065 + ... + 75776321.

Almost surely, 2^19474481601 is an apocalyptic number.

19474481601 is the 139551-st square number.

19474481601 is the 69776-th centered octagonal number.

It is an amenable number.

19474481601 is a deficient number, since it is larger than the sum of its proper divisors (8922087912).

19474481601 is an frugal number, since it uses more digits than its factorization.

19474481601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 19474481601 in words is "nineteen billion, four hundred seventy-four million, four hundred eighty-one thousand, six hundred one".