688783421380 has 96 divisors (see below), whose sum is σ = 1536644390400. Its totient is φ = 258611010048.

The previous prime is 688783421357. The next prime is 688783421401. The reversal of 688783421380 is 83124387886.

688783421380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×688783421380² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19243941 + ... + 19279699.

It is an arithmetic number, because the mean of its divisors is an integer number (16006712400).

Almost surely, 2^688783421380 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 688783421380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768322195200).

688783421380 is an abundant number, since it is smaller than the sum of its proper divisors (847860969020).

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

688783421380 is a wasteful number, since it uses less digits than its factorization.

688783421380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36253 (or 36251 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 688783421380 in words is "six hundred eighty-eight billion, seven hundred eighty-three million, four hundred twenty-one thousand, three hundred eighty".