698191280640 has 800 divisors, whose sum is σ = 2879624335104. Its totient is φ = 158376591360.

The previous prime is 698191280603. The next prime is 698191280641. The reversal of 698191280640 is 46082191896.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (698191280641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 198856485 + ... + 198859995.

Almost surely, 2^698191280640 is an apocalyptic number.

698191280640 is a gapful number since it is divisible by the number (60) 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 698191280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439812167552).

698191280640 is an abundant number, since it is smaller than the sum of its proper divisors (2181433054464).

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

698191280640 is a wasteful number, since it uses less digits than its factorization.

698191280640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690 (or 3665 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 698191280640 in words is "six hundred ninety-eight billion, one hundred ninety-one million, two hundred eighty thousand, six hundred forty".