4001631136 has 24 divisors (see below), whose sum is σ = 8045835840. Its totient is φ = 1958244288.

The previous prime is 4001631133. The next prime is 4001631143. The reversal of 4001631136 is 6311361004.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4001631136.

It is not an unprimeable number, because it can be changed into a prime (4001631131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328826 + ... + 1331833.

It is an arithmetic number, because the mean of its divisors is an integer number (335243160).

Almost surely, 2^4001631136 is an apocalyptic number.

It is an amenable number.

4001631136 is an abundant number, since it is smaller than the sum of its proper divisors (4044204704).

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

4001631136 is a wasteful number, since it uses less digits than its factorization.

4001631136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660716 (or 2660708 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4001631136 is about 63258.4471513489. The cubic root of 4001631136 is about 1587.6167948955.

The spelling of 4001631136 in words is "four billion, one million, six hundred thirty-one thousand, one hundred thirty-six".