68206404252 has 48 divisors (see below), whose sum is σ = 183552427520. Its totient is φ = 19308756672.

The previous prime is 68206404223. The next prime is 68206404289. The reversal of 68206404252 is 25240460286.

It is a super-2 number, since 2×68206404252² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68206404252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3715528 + ... + 3733839.

Almost surely, 2^68206404252 is an apocalyptic number.

It is an amenable number.

68206404252 is an abundant number, since it is smaller than the sum of its proper divisors (115346023268).

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

68206404252 is a wasteful number, since it uses less digits than its factorization.

68206404252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449490 (or 7449488 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 68206404252 in words is "sixty-eight billion, two hundred six million, four hundred four thousand, two hundred fifty-two".