644116611446 has 32 divisors (see below), whose sum is σ = 1275439468032. Its totient is φ = 236192492160.

The previous prime is 644116611419. The next prime is 644116611461.

644116611446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 644116611397 and 644116611406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123014306 + ... + 123019541.

It is an arithmetic number, because the mean of its divisors is an integer number (39857483376).

Almost surely, 2^644116611446 is an apocalyptic number.

644116611446 is a deficient number, since it is larger than the sum of its proper divisors (631322856586).

644116611446 is a wasteful number, since it uses less digits than its factorization.

644116611446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246033884.

The product of its digits is 331776, while the sum is 44.

The spelling of 644116611446 in words is "six hundred forty-four billion, one hundred sixteen million, six hundred eleven thousand, four hundred forty-six".