3998710420445 has 18 divisors (see below), whose sum is σ = 5196032979354. Its totient is φ = 2952850923360.

The previous prime is 3998710420421. The next prime is 3998710420447. The reversal of 3998710420445 is 5440240178993.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18928806724 + 3979781613721 = 137582^2 + 1994939^2 .

It is not a de Polignac number, because 3998710420445 - 2⁸ = 3998710420189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998710420447) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 58094000 + ... + 58162790.

It is an arithmetic number, because the mean of its divisors is an integer number (288668498853).

Almost surely, 2^{3998710420445} is an apocalyptic number.

It is an amenable number.

3998710420445 is a deficient number, since it is larger than the sum of its proper divisors (1197322558909).

3998710420445 is an frugal number, since it uses more digits than its factorization.

3998710420445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137613 (or 68809 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 3998710420445 in words is "three trillion, nine hundred ninety-eight billion, seven hundred ten million, four hundred twenty thousand, four hundred forty-five".