698842349561 has 4 divisors (see below), whose sum is σ = 699520180224. Its totient is φ = 698164518900.

The previous prime is 698842349549. The next prime is 698842349573. The reversal of 698842349561 is 165943248896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (698842349549) and next prime (698842349573).

It is a cyclic number.

It is not a de Polignac number, because 698842349561 - 2²⁶ = 698775240697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698842349501) 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, 338913785 + ... + 338915846.

It is an arithmetic number, because the mean of its divisors is an integer number (174880045056).

Almost surely, 2^698842349561 is an apocalyptic number.

It is an amenable number.

698842349561 is a deficient number, since it is larger than the sum of its proper divisors (677830663).

698842349561 is a wasteful number, since it uses less digits than its factorization.

698842349561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677830662.

The product of its digits is 89579520, while the sum is 65.

The spelling of 698842349561 in words is "six hundred ninety-eight billion, eight hundred forty-two million, three hundred forty-nine thousand, five hundred sixty-one".