6444437634 has 24 divisors (see below), whose sum is σ = 13964466672. Its totient is φ = 2147912280.

The previous prime is 6444437633. The next prime is 6444437647. The reversal of 6444437634 is 4367344446.

It is a happy number.

6444437634 is a `hidden beast` number, since 6 + 4 + 4 + 4 + 4 + 3 + 7 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6444437634.

It is not an unprimeable number, because it can be changed into a prime (6444437633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256017 + ... + 280059.

It is an arithmetic number, because the mean of its divisors is an integer number (581852778).

Almost surely, 2^6444437634 is an apocalyptic number.

6444437634 is an abundant number, since it is smaller than the sum of its proper divisors (7520029038).

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

6444437634 is a wasteful number, since it uses less digits than its factorization.

6444437634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38942 (or 38939 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 45.

The square root of 6444437634 is about 80277.2547736904. The cubic root of 6444437634 is about 1860.9227350156.

The spelling of 6444437634 in words is "six billion, four hundred forty-four million, four hundred thirty-seven thousand, six hundred thirty-four".