544400120065 has 8 divisors (see below), whose sum is σ = 654138598248. Its totient is φ = 434947793280.

The previous prime is 544400120063. The next prime is 544400120111. The reversal of 544400120065 is 560021004445.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1950193921 + 542449926144 = 44161^2 + 736512^2 .

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

It is not a de Polignac number, because 544400120065 - 2¹ = 544400120063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (544400120063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71533662 + ... + 71541271.

It is an arithmetic number, because the mean of its divisors is an integer number (81767324781).

Almost surely, 2^544400120065 is an apocalyptic number.

It is an amenable number.

544400120065 is a deficient number, since it is larger than the sum of its proper divisors (109738478183).

544400120065 is a wasteful number, since it uses less digits than its factorization.

544400120065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143075699.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 544400120065 in words is "five hundred forty-four billion, four hundred million, one hundred twenty thousand, sixty-five".