68813632 has 28 divisors (see below), whose sum is σ = 136822180. Its totient is φ = 34338816.

The previous prime is 68813617. The next prime is 68813639. The reversal of 68813632 is 23631886.

It can be written as a sum of positive squares in 2 ways, for example, as 59228416 + 9585216 = 7696^2 + 3096^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68813591 and 68813600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68813639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52408 + ... + 53704.

Almost surely, 2^68813632 is an apocalyptic number.

It is an amenable number.

68813632 is a deficient number, since it is larger than the sum of its proper divisors (68008548).

68813632 is a wasteful number, since it uses less digits than its factorization.

68813632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2128 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 68813632 is about 8295.3982423992. The cubic root of 68813632 is about 409.7869843299.

The spelling of 68813632 in words is "sixty-eight million, eight hundred thirteen thousand, six hundred thirty-two".