687035520369 has 12 divisors (see below), whose sum is σ = 1082601426192. Its totient is φ = 416385163800.

The previous prime is 687035520257. The next prime is 687035520373. The reversal of 687035520369 is 963025530786.

It is a happy number.

687035520369 is a `hidden beast` number, since 6 + 87 + 0 + 3 + 5 + 520 + 36 + 9 = 666.

It is not a de Polignac number, because 687035520369 - 2¹¹ = 687035518321 is a prime.

It is a super-2 number, since 2×687035520369² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (687035520469) 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, 3469876267 + ... + 3469876464.

It is an arithmetic number, because the mean of its divisors is an integer number (90216785516).

Almost surely, 2^687035520369 is an apocalyptic number.

It is an amenable number.

687035520369 is a deficient number, since it is larger than the sum of its proper divisors (395565905823).

687035520369 is a wasteful number, since it uses less digits than its factorization.

687035520369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939752748 (or 6939752745 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 687035520369 in words is "six hundred eighty-seven billion, thirty-five million, five hundred twenty thousand, three hundred sixty-nine".