6447041631 has 12 divisors (see below), whose sum is σ = 9860181552. Its totient is φ = 4045202496.

The previous prime is 6447041609. The next prime is 6447041651. The reversal of 6447041631 is 1361407446.

6447041631 is a `hidden beast` number, since 644 + 7 + 0 + 4 + 1 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 6447041631 - 2¹⁷ = 6446910559 is a prime.

It is a super-2 number, since 2×6447041631² = 83128691583694280322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447041651) 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 11 ways as a sum of consecutive naturals, for example, 21068611 + ... + 21068916.

It is an arithmetic number, because the mean of its divisors is an integer number (821681796).

Almost surely, 2^6447041631 is an apocalyptic number.

6447041631 is a deficient number, since it is larger than the sum of its proper divisors (3413139921).

6447041631 is a wasteful number, since it uses less digits than its factorization.

6447041631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42137550 (or 42137547 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 6447041631 is about 80293.4719077460. The cubic root of 6447041631 is about 1861.1733482812.

The spelling of 6447041631 in words is "six billion, four hundred forty-seven million, forty-one thousand, six hundred thirty-one".