687068601420 has 192 divisors, whose sum is σ = 2005813627776. Its totient is φ = 175575859200.

The previous prime is 687068601419. The next prime is 687068601469. The reversal of 687068601420 is 24106860786.

It is a self number, because there is not a number n which added to its sum of digits gives 687068601420.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43266522 + ... + 43282398.

It is an arithmetic number, because the mean of its divisors is an integer number (10446945978).

Almost surely, 2^687068601420 is an apocalyptic number.

687068601420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687068601420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002906813888).

687068601420 is an abundant number, since it is smaller than the sum of its proper divisors (1318745026356).

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

687068601420 is a wasteful number, since it uses less digits than its factorization.

687068601420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16220 (or 16218 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 687068601420 in words is "six hundred eighty-seven billion, sixty-eight million, six hundred one thousand, four hundred twenty".