687118846464 has 120 divisors (see below), whose sum is σ = 1992472777152. Its totient is φ = 227953797120.

The previous prime is 687118846429. The next prime is 687118846471. The reversal of 687118846464 is 464648811786.

687118846464 is a `hidden beast` number, since 6 + 87 + 1 + 18 + 84 + 6 + 464 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 618937 + ... + 1325639.

Almost surely, 2^687118846464 is an apocalyptic number.

687118846464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687118846464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996236388576).

687118846464 is an abundant number, since it is smaller than the sum of its proper divisors (1305353930688).

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

687118846464 is a wasteful number, since it uses less digits than its factorization.

687118846464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706938 (or 706919 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 687118846464 in words is "six hundred eighty-seven billion, one hundred eighteen million, eight hundred forty-six thousand, four hundred sixty-four".