638597247873 has 32 divisors (see below), whose sum is σ = 965426985600. Its totient is φ = 372220240896.

The previous prime is 638597247863. The next prime is 638597247877. The reversal of 638597247873 is 378742795836.

638597247873 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 638597247873 - 2⁴ = 638597247857 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 638597247798 and 638597247807.

It is not an unprimeable number, because it can be changed into a prime (638597247877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3479943 + ... + 3658851.

It is an arithmetic number, because the mean of its divisors is an integer number (30169593300).

Almost surely, 2^638597247873 is an apocalyptic number.

It is an amenable number.

638597247873 is a deficient number, since it is larger than the sum of its proper divisors (326829737727).

638597247873 is a wasteful number, since it uses less digits than its factorization.

638597247873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183761.

The product of its digits is 426746880, while the sum is 69.

The spelling of 638597247873 in words is "six hundred thirty-eight billion, five hundred ninety-seven million, two hundred forty-seven thousand, eight hundred seventy-three".