68563640 has 16 divisors (see below), whose sum is σ = 154268280. Its totient is φ = 27425440.

The previous prime is 68563619. The next prime is 68563643. The reversal of 68563640 is 4636586.

It is a junction number, because it is equal to n+sod(n) for n = 68563594 and 68563603.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857006 + ... + 857085.

Almost surely, 2^68563640 is an apocalyptic number.

It is an amenable number.

68563640 is an abundant number, since it is smaller than the sum of its proper divisors (85704640).

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

68563640 is a wasteful number, since it uses less digits than its factorization.

68563640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714102 (or 1714098 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 68563640 is about 8280.3164190748. The cubic root of 68563640 is about 409.2901458843.

The spelling of 68563640 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred forty".