687878061390240 has 192 divisors, whose sum is σ = 2498275721684736. Its totient is φ = 155837861609472.

The previous prime is 687878061390239. The next prime is 687878061390259. The reversal of 687878061390240 is 42093160878786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 905485867 + ... + 906245226.

It is an arithmetic number, because the mean of its divisors is an integer number (13011852717108).

Almost surely, 2^{687878061390240} is an apocalyptic number.

687878061390240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687878061390240 is an abundant number, since it is smaller than the sum of its proper divisors (1810397660294496).

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

687878061390240 is a wasteful number, since it uses less digits than its factorization.

687878061390240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811731231 (or 1811731223 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 69.

The spelling of 687878061390240 in words is "six hundred eighty-seven trillion, eight hundred seventy-eight billion, sixty-one million, three hundred ninety thousand, two hundred forty".