4428487994561 has 4 divisors (see below), whose sum is σ = 4455005886912. Its totient is φ = 4401970102212.

The previous prime is 4428487994533. The next prime is 4428487994573. The reversal of 4428487994561 is 1654997848244.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4428487994561 - 2¹⁴ = 4428487978177 is a prime.

It is a super-2 number, since 2×4428487994561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4428487994261) 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 3 ways as a sum of consecutive naturals, for example, 13258945925 + ... + 13258946258.

It is an arithmetic number, because the mean of its divisors is an integer number (1113751471728).

Almost surely, 2^{4428487994561} is an apocalyptic number.

It is an amenable number.

4428487994561 is a deficient number, since it is larger than the sum of its proper divisors (26517892351).

4428487994561 is a wasteful number, since it uses less digits than its factorization.

4428487994561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26517892350.

The product of its digits is 557383680, while the sum is 71.

The spelling of 4428487994561 in words is "four trillion, four hundred twenty-eight billion, four hundred eighty-seven million, nine hundred ninety-four thousand, five hundred sixty-one".