687085434464 has 192 divisors, whose sum is σ = 1609878473280. Its totient is φ = 284554321920.

The previous prime is 687085434461. The next prime is 687085434487. The reversal of 687085434464 is 464434580786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687085434461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138160682 + ... + 138165654.

It is an arithmetic number, because the mean of its divisors is an integer number (8384783715).

Almost surely, 2^687085434464 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 687085434464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804939236640).

687085434464 is an abundant number, since it is smaller than the sum of its proper divisors (922793038816).

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

687085434464 is a wasteful number, since it uses less digits than its factorization.

687085434464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 59.

The spelling of 687085434464 in words is "six hundred eighty-seven billion, eighty-five million, four hundred thirty-four thousand, four hundred sixty-four".