444640456775555 has 8 divisors (see below), whose sum is σ = 533570542694592. Its totient is φ = 355711035711168.

The previous prime is 444640456775533. The next prime is 444640456775579. The reversal of 444640456775555 is 555577654046444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 444640456775555 - 2⁸ = 444640456775299 is a prime.

It is a Duffinian 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, 164741162 + ... + 167418431.

It is an arithmetic number, because the mean of its divisors is an integer number (66696317836824).

Almost surely, 2^{444640456775555} is an apocalyptic number.

444640456775555 is a deficient number, since it is larger than the sum of its proper divisors (88930085919037).

444640456775555 is a wasteful number, since it uses less digits than its factorization.

444640456775555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332427325.

The product of its (nonzero) digits is 5644800000, while the sum is 71.

The spelling of 444640456775555 in words is "four hundred forty-four trillion, six hundred forty billion, four hundred fifty-six million, seven hundred seventy-five thousand, five hundred fifty-five".