6444064040042 has 4 divisors (see below), whose sum is σ = 9666096060066. Its totient is φ = 3222032020020.

The previous prime is 6444064040003. The next prime is 6444064040053. The reversal of 6444064040042 is 2400404604446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6434385218881 + 9678821161 = 2536609^2 + 98381^2 .

It is a super-2 number, since 2×6444064040042² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6444064039978 and 6444064040005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611016010009 + ... + 1611016010012.

Almost surely, 2^{6444064040042} is an apocalyptic number.

6444064040042 is a deficient number, since it is larger than the sum of its proper divisors (3222032020024).

6444064040042 is a wasteful number, since it uses less digits than its factorization.

6444064040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222032020023.

The product of its (nonzero) digits is 294912, while the sum is 38.

Adding to 6444064040042 its reverse (2400404604446), we get a palindrome (8844468644488).

The spelling of 6444064040042 in words is "six trillion, four hundred forty-four billion, sixty-four million, forty thousand, forty-two".