444621541467464 has 16 divisors (see below), whose sum is σ = 834247152583020. Its totient is φ = 222155634112000.

The previous prime is 444621541467377. The next prime is 444621541467479. The reversal of 444621541467464 is 464764145126444.

It can be written as a sum of positive squares in 2 ways, for example, as 418778979528100 + 25842561939364 = 20464090^2 + 5083558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 444621541467397 and 444621541467406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19392065537 + ... + 19392088464.

Almost surely, 2^{444621541467464} is an apocalyptic number.

It is an amenable number.

444621541467464 is a deficient number, since it is larger than the sum of its proper divisors (389625611115556).

444621541467464 is a wasteful number, since it uses less digits than its factorization.

444621541467464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38784155440 (or 38784155436 counting only the distinct ones).

The product of its digits is 247726080, while the sum is 62.

The spelling of 444621541467464 in words is "four hundred forty-four trillion, six hundred twenty-one billion, five hundred forty-one million, four hundred sixty-seven thousand, four hundred sixty-four".