1398555885579 has 4 divisors (see below), whose sum is σ = 1864741180776. Its totient is φ = 932370590384.

The previous prime is 1398555885533. The next prime is 1398555885589. The reversal of 1398555885579 is 9755885558931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1398555885579 - 2¹⁷ = 1398555754507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398555885589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233092647594 + ... + 233092647599.

It is an arithmetic number, because the mean of its divisors is an integer number (466185295194).

Almost surely, 2^{1398555885579} is an apocalyptic number.

1398555885579 is a deficient number, since it is larger than the sum of its proper divisors (466185295197).

1398555885579 is an equidigital number, since it uses as much as digits as its factorization.

1398555885579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466185295196.

The product of its digits is 2721600000, while the sum is 78.

The spelling of 1398555885579 in words is "one trillion, three hundred ninety-eight billion, five hundred fifty-five million, eight hundred eighty-five thousand, five hundred seventy-nine".