1688634933274 has 4 divisors (see below), whose sum is σ = 2532952399914. Its totient is φ = 844317466636.

The previous prime is 1688634933259. The next prime is 1688634933329. The reversal of 1688634933274 is 4723394368861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1643049694225 + 45585239049 = 1281815^2 + 213507^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422158733317 + ... + 422158733320.

Almost surely, 2^{1688634933274} is an apocalyptic number.

1688634933274 is a deficient number, since it is larger than the sum of its proper divisors (844317466640).

1688634933274 is an equidigital number, since it uses as much as digits as its factorization.

1688634933274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844317466639.

The product of its digits is 125411328, while the sum is 64.

The spelling of 1688634933274 in words is "one trillion, six hundred eighty-eight billion, six hundred thirty-four million, nine hundred thirty-three thousand, two hundred seventy-four".