687648846786 has 32 divisors (see below), whose sum is σ = 1500947387136. Its totient is φ = 208291962000.

The previous prime is 687648846763. The next prime is 687648846803.

687648846786 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×687648846786² (a number of 24 digits) contains 22 as substring.

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, 2001580 + ... + 2319831.

It is an arithmetic number, because the mean of its divisors is an integer number (46904605848).

Almost surely, 2^687648846786 is an apocalyptic number.

687648846786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

687648846786 is an abundant number, since it is smaller than the sum of its proper divisors (813298540350).

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

687648846786 is a wasteful number, since it uses less digits than its factorization.

687648846786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323838.

The product of its digits is 4161798144, while the sum is 78.

The spelling of 687648846786 in words is "six hundred eighty-seven billion, six hundred forty-eight million, eight hundred forty-six thousand, seven hundred eighty-six".