68263651472 has 20 divisors (see below), whose sum is σ = 134756313660. Its totient is φ = 33487828608.

The previous prime is 68263651441. The next prime is 68263651507. The reversal of 68263651472 is 27415636286.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59778294016 + 8485357456 = 244496^2 + 92116^2 .

It is a super-2 number, since 2×68263651472² (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 68263651472.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40248947 + ... + 40250642.

It is an arithmetic number, because the mean of its divisors is an integer number (6737815683).

Almost surely, 2^68263651472 is an apocalyptic number.

It is an amenable number.

68263651472 is a deficient number, since it is larger than the sum of its proper divisors (66492662188).

68263651472 is a wasteful number, since it uses less digits than its factorization.

68263651472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80499650 (or 80499644 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The spelling of 68263651472 in words is "sixty-eight billion, two hundred sixty-three million, six hundred fifty-one thousand, four hundred seventy-two".