68641356 has 72 divisors (see below), whose sum is σ = 188225856. Its totient is φ = 19410720.

The previous prime is 68641351. The next prime is 68641387. The reversal of 68641356 is 65314686.

It is not an unprimeable number, because it can be changed into a prime (68641351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62371 + ... + 63461.

It is an arithmetic number, because the mean of its divisors is an integer number (2614248).

Almost surely, 2^68641356 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 68641356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94112928).

68641356 is an abundant number, since it is smaller than the sum of its proper divisors (119584500).

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

68641356 is a wasteful number, since it uses less digits than its factorization.

68641356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219 (or 1210 counting only the distinct ones).

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

The square root of 68641356 is about 8285.0079058502. The cubic root of 68641356 is about 409.4447291902. Note that the first 3 decimals are identical.

The spelling of 68641356 in words is "sixty-eight million, six hundred forty-one thousand, three hundred fifty-six".