688881353474 has 8 divisors (see below), whose sum is σ = 1033325926860. Its totient is φ = 344439377856.

The previous prime is 688881353473. The next prime is 688881353491. The reversal of 688881353474 is 474353188886.

It can be written as a sum of positive squares in 2 ways, for example, as 494230090225 + 194651263249 = 703015^2 + 441193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 688881353474.

It is not an unprimeable number, because it can be changed into a prime (688881353473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278942 + ... + 1206470.

Almost surely, 2^688881353474 is an apocalyptic number.

688881353474 is a deficient number, since it is larger than the sum of its proper divisors (344444573386).

688881353474 is a wasteful number, since it uses less digits than its factorization.

688881353474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298884.

The product of its digits is 123863040, while the sum is 65.

The spelling of 688881353474 in words is "six hundred eighty-eight billion, eight hundred eighty-one million, three hundred fifty-three thousand, four hundred seventy-four".