687441287904 has 192 divisors, whose sum is σ = 2265253724160. Its totient is φ = 177984069120.

The previous prime is 687441287903. The next prime is 687441287917. The reversal of 687441287904 is 409782144786.

It is a super-2 number, since 2×687441287904² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687441287903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 876792 + ... + 1464119.

It is an arithmetic number, because the mean of its divisors is an integer number (11798196480).

Almost surely, 2^687441287904 is an apocalyptic number.

It is an amenable number.

687441287904 is an abundant number, since it is smaller than the sum of its proper divisors (1577812436256).

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

687441287904 is a wasteful number, since it uses less digits than its factorization.

687441287904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340973 (or 2340965 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 687441287904 in words is "six hundred eighty-seven billion, four hundred forty-one million, two hundred eighty-seven thousand, nine hundred four".