687470821140 has 96 divisors (see below), whose sum is σ = 1943423153280. Its totient is φ = 181571567616.

The previous prime is 687470821129. The next prime is 687470821151. The reversal of 687470821140 is 41128074786.

It is an interprime number because it is at equal distance from previous prime (687470821129) and next prime (687470821151).

It is a super-2 number, since 2×687470821140² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 687470821140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2497896 + ... + 2759424.

It is an arithmetic number, because the mean of its divisors is an integer number (20243991180).

Almost surely, 2^687470821140 is an apocalyptic number.

687470821140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687470821140 is an abundant number, since it is smaller than the sum of its proper divisors (1255952332140).

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

687470821140 is a wasteful number, since it uses less digits than its factorization.

687470821140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261961 (or 261959 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 687470821140 in words is "six hundred eighty-seven billion, four hundred seventy million, eight hundred twenty-one thousand, one hundred forty".