1698840405445 has 32 divisors (see below), whose sum is σ = 2063170310400. Its totient is φ = 1342770823680.

The previous prime is 1698840405421. The next prime is 1698840405497. The reversal of 1698840405445 is 5445040488961.

It is a de Polignac number, because none of the positive numbers 2^k-1698840405445 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1698840405445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423332259 + ... + 423336271.

It is an arithmetic number, because the mean of its divisors is an integer number (64474072200).

Almost surely, 2^{1698840405445} is an apocalyptic number.

It is an amenable number.

1698840405445 is a deficient number, since it is larger than the sum of its proper divisors (364329904955).

1698840405445 is a wasteful number, since it uses less digits than its factorization.

1698840405445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6045.

The product of its (nonzero) digits is 22118400, while the sum is 58.

The spelling of 1698840405445 in words is "one trillion, six hundred ninety-eight billion, eight hundred forty million, four hundred five thousand, four hundred forty-five".