6444695073638 has 32 divisors (see below), whose sum is σ = 10251816606720. Its totient is φ = 3028023613440.

The previous prime is 6444695073631. The next prime is 6444695073683. The reversal of 6444695073638 is 8363705964446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444695073631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59672795 + ... + 59780697.

It is an arithmetic number, because the mean of its divisors is an integer number (320369268960).

Almost surely, 2^{6444695073638} is an apocalyptic number.

6444695073638 is a deficient number, since it is larger than the sum of its proper divisors (3807121533082).

6444695073638 is a wasteful number, since it uses less digits than its factorization.

6444695073638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110672.

The product of its (nonzero) digits is 313528320, while the sum is 65.

The spelling of 6444695073638 in words is "six trillion, four hundred forty-four billion, six hundred ninety-five million, seventy-three thousand, six hundred thirty-eight".