688020418850 has 24 divisors (see below), whose sum is σ = 1280700232320. Its totient is φ = 274996930320.

The previous prime is 688020418801. The next prime is 688020418853. The reversal of 688020418850 is 58814020886.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (688020418853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5215130 + ... + 5345429.

It is an arithmetic number, because the mean of its divisors is an integer number (53362509680).

Almost surely, 2^688020418850 is an apocalyptic number.

688020418850 is a deficient number, since it is larger than the sum of its proper divisors (592679813470).

688020418850 is a wasteful number, since it uses less digits than its factorization.

688020418850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561874 (or 10561869 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 50.

The spelling of 688020418850 in words is "six hundred eighty-eight billion, twenty million, four hundred eighteen thousand, eight hundred fifty".