6445665111103 has 16 divisors (see below), whose sum is σ = 6578846049600. Its totient is φ = 6312922237440.

The previous prime is 6445665111091. The next prime is 6445665111107. The reversal of 6445665111103 is 3011115665446.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6445665111103 is a prime.

It is a super-3 number, since 3×6445665111103³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6445665111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445665111107) 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, 70490473 + ... + 70581853.

It is an arithmetic number, because the mean of its divisors is an integer number (411177878100).

Almost surely, 2^{6445665111103} is an apocalyptic number.

6445665111103 is a deficient number, since it is larger than the sum of its proper divisors (133180938497).

6445665111103 is a wasteful number, since it uses less digits than its factorization.

6445665111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93762.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 6445665111103 in words is "six trillion, four hundred forty-five billion, six hundred sixty-five million, one hundred eleven thousand, one hundred three".