687761616 has 40 divisors (see below), whose sum is σ = 1801065280. Its totient is φ = 226112256.

The previous prime is 687761603. The next prime is 687761671. The reversal of 687761616 is 616167786.

687761616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94636 + ... + 101643.

It is an arithmetic number, because the mean of its divisors is an integer number (45026632).

Almost surely, 2^687761616 is an apocalyptic number.

It is an amenable number.

687761616 is an abundant number, since it is smaller than the sum of its proper divisors (1113303664).

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

687761616 is a wasteful number, since it uses less digits than its factorization.

687761616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196363 (or 196357 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 687761616 is about 26225.2095511170. The cubic root of 687761616 is about 882.6990206172.

The spelling of 687761616 in words is "six hundred eighty-seven million, seven hundred sixty-one thousand, six hundred sixteen".