687623669952 has 112 divisors (see below), whose sum is σ = 1848667107840. Its totient is φ = 225532689408.

The previous prime is 687623669951. The next prime is 687623669959. The reversal of 687623669952 is 259966326786.

It is a super-2 number, since 2×687623669952² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (687623669951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4366863 + ... + 4521585.

It is an arithmetic number, because the mean of its divisors is an integer number (16505956320).

Almost surely, 2^687623669952 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 687623669952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924333553920).

687623669952 is an abundant number, since it is smaller than the sum of its proper divisors (1161043437888).

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

687623669952 is a wasteful number, since it uses less digits than its factorization.

687623669952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155110 (or 155100 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 69.

The spelling of 687623669952 in words is "six hundred eighty-seven billion, six hundred twenty-three million, six hundred sixty-nine thousand, nine hundred fifty-two".