6331535978 has 32 divisors (see below), whose sum is σ = 9950459904. Its totient is φ = 3018762432.

The previous prime is 6331535929. The next prime is 6331536017. The reversal of 6331535978 is 8795351336.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775976 + ... + 784092.

It is an arithmetic number, because the mean of its divisors is an integer number (310951872).

Almost surely, 2^6331535978 is an apocalyptic number.

6331535978 is a deficient number, since it is larger than the sum of its proper divisors (3618923926).

6331535978 is a wasteful number, since it uses less digits than its factorization.

6331535978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8366.

The product of its digits is 2041200, while the sum is 50.

The square root of 6331535978 is about 79570.9493345404. The cubic root of 6331535978 is about 1849.9913296891.

The spelling of 6331535978 in words is "six billion, three hundred thirty-one million, five hundred thirty-five thousand, nine hundred seventy-eight".