1698391349644 has 24 divisors (see below), whose sum is σ = 3244340404368. Its totient is φ = 771530135040.

The previous prime is 1698391349639. The next prime is 1698391349647. The reversal of 1698391349644 is 4469431938961.

It is a self number, because there is not a number n which added to its sum of digits gives 1698391349644.

It is not an unprimeable number, because it can be changed into a prime (1698391349647) 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 7 ways as a sum of consecutive naturals, for example, 11574589 + ... + 11720404.

It is an arithmetic number, because the mean of its divisors is an integer number (135180850182).

Almost surely, 2^{1698391349644} is an apocalyptic number.

It is an amenable number.

1698391349644 is a deficient number, since it is larger than the sum of its proper divisors (1545949054724).

1698391349644 is a wasteful number, since it uses less digits than its factorization.

1698391349644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23296665 (or 23296663 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 67.

The spelling of 1698391349644 in words is "one trillion, six hundred ninety-eight billion, three hundred ninety-one million, three hundred forty-nine thousand, six hundred forty-four".