6321642738 has 16 divisors (see below), whose sum is σ = 12645516576. Its totient is φ = 2106842400.

The previous prime is 6321642737. The next prime is 6321642757. The reversal of 6321642738 is 8372461236.

It is a self number, because there is not a number n which added to its sum of digits gives 6321642738.

It is not an unprimeable number, because it can be changed into a prime (6321642737) 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, 54931 + ... + 125142.

It is an arithmetic number, because the mean of its divisors is an integer number (790344786).

Almost surely, 2^6321642738 is an apocalyptic number.

6321642738 is an abundant number, since it is smaller than the sum of its proper divisors (6323873838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6321642738 is a wasteful number, since it uses less digits than its factorization.

6321642738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185929.

The product of its digits is 290304, while the sum is 42.

The square root of 6321642738 is about 79508.7588759880. The cubic root of 6321642738 is about 1849.0272692946.

The spelling of 6321642738 in words is "six billion, three hundred twenty-one million, six hundred forty-two thousand, seven hundred thirty-eight".