698681422656 has 504 divisors, whose sum is σ = 2461613263200. Its totient is φ = 195845465088.

The previous prime is 698681422631. The next prime is 698681422693. The reversal of 698681422656 is 656224186896.

698681422656 is a `hidden beast` number, since 6 + 9 + 86 + 81 + 422 + 6 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a super-2 number, since 2×698681422656² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 698681422593 and 698681422602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 40379895 + ... + 40397193.

It is an arithmetic number, because the mean of its divisors is an integer number (4884153300).

Almost surely, 2^698681422656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698681422656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230806631600).

698681422656 is an abundant number, since it is smaller than the sum of its proper divisors (1762931840544).

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

698681422656 is a wasteful number, since it uses less digits than its factorization.

698681422656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17393 (or 17364 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 698681422656 in words is "six hundred ninety-eight billion, six hundred eighty-one million, four hundred twenty-two thousand, six hundred fifty-six".