64444155144446 has 16 divisors (see below), whose sum is σ = 120518939491200. Its totient is φ = 25108112393880.

The previous prime is 64444155144433. The next prime is 64444155144497.

64444155144446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64444155144391 and 64444155144400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209234269796 + ... + 209234270103.

It is an arithmetic number, because the mean of its divisors is an integer number (7532433718200).

Almost surely, 2^{64444155144446} is an apocalyptic number.

64444155144446 is a deficient number, since it is larger than the sum of its proper divisors (56074784346754).

64444155144446 is a wasteful number, since it uses less digits than its factorization.

64444155144446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418468539919.

The product of its digits is 58982400, while the sum is 56.

The spelling of 64444155144446 in words is "sixty-four trillion, four hundred forty-four billion, one hundred fifty-five million, one hundred forty-four thousand, four hundred forty-six".