6391004634 has 144 divisors (see below), whose sum is σ = 16575826176. Its totient is φ = 1773576000.

The previous prime is 6391004623. The next prime is 6391004639. The reversal of 6391004634 is 4364001936.

6391004634 is a `hidden beast` number, since 6 + 3 + 9 + 10 + 0 + 4 + 634 = 666.

It is not an unprimeable number, because it can be changed into a prime (6391004639) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6259044 + ... + 6260064.

It is an arithmetic number, because the mean of its divisors is an integer number (115109904).

Almost surely, 2^6391004634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6391004634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8287913088).

6391004634 is an abundant number, since it is smaller than the sum of its proper divisors (10184821542).

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

6391004634 is a wasteful number, since it uses less digits than its factorization.

6391004634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 6391004634 is about 79943.7591935731. The cubic root of 6391004634 is about 1855.7652757949.

The spelling of 6391004634 in words is "six billion, three hundred ninety-one million, four thousand, six hundred thirty-four".