687086924544 has 108 divisors (see below), whose sum is σ = 2054413063976. Its totient is φ = 229028954112.

The previous prime is 687086924543. The next prime is 687086924549. The reversal of 687086924544 is 445429680786.

687086924544 is a `hidden beast` number, since 6 + 8 + 7 + 0 + 8 + 69 + 24 + 544 = 666.

687086924544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (108).

It is not an unprimeable number, because it can be changed into a prime (687086924543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5460289 + ... + 5584704.

Almost surely, 2^687086924544 is an apocalyptic number.

687086924544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

687086924544 is an abundant number, since it is smaller than the sum of its proper divisors (1367326139432).

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

687086924544 is an equidigital number, since it uses as much as digits as its factorization.

687086924544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11045024 (or 11044998 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 63.

The spelling of 687086924544 in words is "six hundred eighty-seven billion, eighty-six million, nine hundred twenty-four thousand, five hundred forty-four".