687041122064 has 80 divisors (see below), whose sum is σ = 1529874492480. Its totient is φ = 295605319680.

The previous prime is 687041122057. The next prime is 687041122073. The reversal of 687041122064 is 460221140786.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3903284 + ... + 4075500.

It is an arithmetic number, because the mean of its divisors is an integer number (19123431156).

Almost surely, 2^687041122064 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 687041122064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764937246240).

687041122064 is an abundant number, since it is smaller than the sum of its proper divisors (842833370416).

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

687041122064 is a wasteful number, since it uses less digits than its factorization.

687041122064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173448 (or 173442 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 687041122064 in words is "six hundred eighty-seven billion, forty-one million, one hundred twenty-two thousand, sixty-four".