698439136640 has 512 divisors, whose sum is σ = 2085754752000. Its totient is φ = 218215710720.

The previous prime is 698439136627. The next prime is 698439136643. The reversal of 698439136640 is 46631934896.

It is a self number, because there is not a number n which added to its sum of digits gives 698439136640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698439136643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1291014770 + ... + 1291015310.

It is an arithmetic number, because the mean of its divisors is an integer number (4073739750).

Almost surely, 2^698439136640 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 698439136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042877376000).

698439136640 is an abundant number, since it is smaller than the sum of its proper divisors (1387315615360).

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

698439136640 is a wasteful number, since it uses less digits than its factorization.

698439136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 698439136640 in words is "six hundred ninety-eight billion, four hundred thirty-nine million, one hundred thirty-six thousand, six hundred forty".