4445718728619 has 8 divisors (see below), whose sum is σ = 6774428538880. Its totient is φ = 2540410702056.

The previous prime is 4445718728609. The next prime is 4445718728623. The reversal of 4445718728619 is 9168278175444.

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

It is not a de Polignac number, because 4445718728619 - 2¹⁷ = 4445718597547 is a prime.

It is a super-2 number, since 2×4445718728619² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4445718728619.

It is not an unprimeable number, because it can be changed into a prime (4445718728609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105850445899 + ... + 105850445940.

It is an arithmetic number, because the mean of its divisors is an integer number (846803567360).

Almost surely, 2^{4445718728619} is an apocalyptic number.

4445718728619 is a deficient number, since it is larger than the sum of its proper divisors (2328709810261).

4445718728619 is a wasteful number, since it uses less digits than its factorization.

4445718728619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211700891849.

The product of its digits is 108380160, while the sum is 66.

The spelling of 4445718728619 in words is "four trillion, four hundred forty-five billion, seven hundred eighteen million, seven hundred twenty-eight thousand, six hundred nineteen".