68681136400 has 60 divisors (see below), whose sum is σ = 165036854500. Its totient is φ = 27467389440.

The previous prime is 68681136397. The next prime is 68681136401. The reversal of 68681136400 is 463118686.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1720258576 + 66960877824 = 41476^2 + 258768^2 .

It is not an unprimeable number, because it can be changed into a prime (68681136401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2767246 + ... + 2791954.

Almost surely, 2^68681136400 is an apocalyptic number.

It is an amenable number.

68681136400 is an abundant number, since it is smaller than the sum of its proper divisors (96355718100).

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

68681136400 is a wasteful number, since it uses less digits than its factorization.

68681136400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31676 (or 31665 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 68681136400 in words is "sixty-eight billion, six hundred eighty-one million, one hundred thirty-six thousand, four hundred".