687252416834 has 4 divisors (see below), whose sum is σ = 1030878625254. Its totient is φ = 343626208416.

The previous prime is 687252416819. The next prime is 687252416839. The reversal of 687252416834 is 438614252786.

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., 357837258025 + 329415158809 = 598195^2 + 573947^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 687252416834.

It is not an unprimeable number, because it can be changed into a prime (687252416839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171813104207 + ... + 171813104210.

Almost surely, 2^687252416834 is an apocalyptic number.

687252416834 is a deficient number, since it is larger than the sum of its proper divisors (343626208420).

687252416834 is a wasteful number, since it uses less digits than its factorization.

687252416834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343626208419.

The product of its digits is 15482880, while the sum is 56.

The spelling of 687252416834 in words is "six hundred eighty-seven billion, two hundred fifty-two million, four hundred sixteen thousand, eight hundred thirty-four".