4645638143 has 4 divisors (see below), whose sum is σ = 4648339248. Its totient is φ = 4642937040.

The previous prime is 4645638017. The next prime is 4645638157. The reversal of 4645638143 is 3418365464.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4645638143 - 2¹⁴ = 4645621759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4645638094 and 4645638103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4645638443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347971 + ... + 1351412.

It is an arithmetic number, because the mean of its divisors is an integer number (1162084812).

Almost surely, 2^4645638143 is an apocalyptic number.

4645638143 is a deficient number, since it is larger than the sum of its proper divisors (2701105).

4645638143 is a wasteful number, since it uses less digits than its factorization.

4645638143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701104.

The product of its digits is 829440, while the sum is 44.

The square root of 4645638143 is about 68158.9182939401. The cubic root of 4645638143 is about 1668.5854783204.

The spelling of 4645638143 in words is "four billion, six hundred forty-five million, six hundred thirty-eight thousand, one hundred forty-three".