4191312638 has 16 divisors (see below), whose sum is σ = 6846066000. Its totient is φ = 1916897472.

The previous prime is 4191312637. The next prime is 4191312649. The reversal of 4191312638 is 8362131914.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4191312637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900583 + ... + 1902786.

It is an arithmetic number, because the mean of its divisors is an integer number (427879125).

Almost surely, 2^4191312638 is an apocalyptic number.

4191312638 is a deficient number, since it is larger than the sum of its proper divisors (2654753362).

4191312638 is a wasteful number, since it uses less digits than its factorization.

4191312638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803419.

The product of its digits is 31104, while the sum is 38.

The square root of 4191312638 is about 64740.3478365694. The cubic root of 4191312638 is about 1612.3154623906.

The spelling of 4191312638 in words is "four billion, one hundred ninety-one million, three hundred twelve thousand, six hundred thirty-eight".