698388490655 has 16 divisors (see below), whose sum is σ = 874528954560. Its totient is φ = 534403676928.

The previous prime is 698388490651. The next prime is 698388490661. The reversal of 698388490655 is 556094883896.

It is a cyclic number.

It is not a de Polignac number, because 698388490655 - 2² = 698388490651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698388490651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5469419 + ... + 5595651.

It is an arithmetic number, because the mean of its divisors is an integer number (54658059660).

Almost surely, 2^698388490655 is an apocalyptic number.

698388490655 is a deficient number, since it is larger than the sum of its proper divisors (176140463905).

698388490655 is a wasteful number, since it uses less digits than its factorization.

698388490655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174370.

The product of its (nonzero) digits is 447897600, while the sum is 71.

The spelling of 698388490655 in words is "six hundred ninety-eight billion, three hundred eighty-eight million, four hundred ninety thousand, six hundred fifty-five".