687951159786 has 96 divisors (see below), whose sum is σ = 1681476159168. Its totient is φ = 201483659520.

The previous prime is 687951159781. The next prime is 687951159787.

687951159786 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (687951159781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213870 + ... + 1192326.

It is an arithmetic number, because the mean of its divisors is an integer number (17515376658).

Almost surely, 2^687951159786 is an apocalyptic number.

687951159786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 687951159786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840738079584).

687951159786 is an abundant number, since it is smaller than the sum of its proper divisors (993524999382).

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

687951159786 is a wasteful number, since it uses less digits than its factorization.

687951159786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978596 (or 978593 counting only the distinct ones).

The product of its digits is 228614400, while the sum is 72.

The spelling of 687951159786 in words is "six hundred eighty-seven billion, nine hundred fifty-one million, one hundred fifty-nine thousand, seven hundred eighty-six".