68641536 has 72 divisors (see below), whose sum is σ = 184287040. Its totient is φ = 22680576.

The previous prime is 68641501. The next prime is 68641541. The reversal of 68641536 is 63514686.

It is a junction number, because it is equal to n+sod(n) for n = 68641494 and 68641503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106431 + ... + 107073.

Almost surely, 2^68641536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68641536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92143520).

68641536 is an abundant number, since it is smaller than the sum of its proper divisors (115645504).

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

68641536 is a wasteful number, since it uses less digits than its factorization.

68641536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 787 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 68641536 is about 8285.0187688381. The cubic root of 68641536 is about 409.4450870891.

The spelling of 68641536 in words is "sixty-eight million, six hundred forty-one thousand, five hundred thirty-six".