68563644 has 96 divisors (see below), whose sum is σ = 175440384. Its totient is φ = 20782080.

The previous prime is 68563643. The next prime is 68563657. The reversal of 68563644 is 44636586.

It is a junction number, because it is equal to n+sod(n) for n = 68563596 and 68563605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68563643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826027 + ... + 826109.

It is an arithmetic number, because the mean of its divisors is an integer number (1827504).

Almost surely, 2^68563644 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 68563644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87720192).

68563644 is an abundant number, since it is smaller than the sum of its proper divisors (106876740).

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

68563644 is a wasteful number, since it uses less digits than its factorization.

68563644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 225 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 68563644 is about 8280.3166606115. The cubic root of 68563644 is about 409.2901538436.

The spelling of 68563644 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred forty-four".