6638447634 has 64 divisors (see below), whose sum is σ = 17051295744. Its totient is φ = 1674674496.

The previous prime is 6638447593. The next prime is 6638447659. The reversal of 6638447634 is 4367448366.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251754 + ... + 276869.

It is an arithmetic number, because the mean of its divisors is an integer number (266426496).

Almost surely, 2^6638447634 is an apocalyptic number.

6638447634 is an abundant number, since it is smaller than the sum of its proper divisors (10412848110).

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

6638447634 is a wasteful number, since it uses less digits than its factorization.

6638447634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528671.

The product of its digits is 6967296, while the sum is 51.

The square root of 6638447634 is about 81476.6692618200. The cubic root of 6638447634 is about 1879.4127894823.

The spelling of 6638447634 in words is "six billion, six hundred thirty-eight million, four hundred forty-seven thousand, six hundred thirty-four".