698610780864 has 168 divisors, whose sum is σ = 2041901194320. Its totient is φ = 228288632832.

The previous prime is 698610780827. The next prime is 698610780919. The reversal of 698610780864 is 468087016896.

698610780864 is a `hidden beast` number, since 6 + 9 + 8 + 610 + 7 + 8 + 0 + 8 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39891342 + ... + 39908850.

Almost surely, 2^698610780864 is an apocalyptic number.

698610780864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698610780864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020950597160).

698610780864 is an abundant number, since it is smaller than the sum of its proper divisors (1343290413456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698610780864 is a wasteful number, since it uses less digits than its factorization.

698610780864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18887 (or 18874 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 698610780864 in words is "six hundred ninety-eight billion, six hundred ten million, seven hundred eighty thousand, eight hundred sixty-four".