4638891389231 has 16 divisors (see below), whose sum is σ = 5204279818368. Its totient is φ = 4098935412000.

The previous prime is 4638891389221. The next prime is 4638891389243. The reversal of 4638891389231 is 1329831988364.

4638891389231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4638891389231 - 2³⁴ = 4621711520047 is a prime.

It is a super-2 number, since 2×4638891389231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638891389221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37119545 + ... + 37244306.

It is an arithmetic number, because the mean of its divisors is an integer number (325267488648).

Almost surely, 2^{4638891389231} is an apocalyptic number.

4638891389231 is a deficient number, since it is larger than the sum of its proper divisors (565388429137).

4638891389231 is a wasteful number, since it uses less digits than its factorization.

4638891389231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74364022.

The product of its digits is 53747712, while the sum is 65.

The spelling of 4638891389231 in words is "four trillion, six hundred thirty-eight billion, eight hundred ninety-one million, three hundred eighty-nine thousand, two hundred thirty-one".