687350516440 has 96 divisors (see below), whose sum is σ = 1904860437120. Its totient is φ = 221800492032.

The previous prime is 687350516383. The next prime is 687350516443. The reversal of 687350516440 is 44615053786.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687350516443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10281064 + ... + 10347703.

It is an arithmetic number, because the mean of its divisors is an integer number (19842296220).

Almost surely, 2^687350516440 is an apocalyptic number.

It is an amenable number.

687350516440 is an abundant number, since it is smaller than the sum of its proper divisors (1217509920680).

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

687350516440 is a wasteful number, since it uses less digits than its factorization.

687350516440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20628809 (or 20628798 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 687350516440 in words is "six hundred eighty-seven billion, three hundred fifty million, five hundred sixteen thousand, four hundred forty".