68557544 has 16 divisors (see below), whose sum is σ = 140231520. Its totient is φ = 31162480.

The previous prime is 68557507. The next prime is 68557553. The reversal of 68557544 is 44575586.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 68557495 and 68557504.

It is an unprimeable number.

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, 389444 + ... + 389619.

It is an arithmetic number, because the mean of its divisors is an integer number (8764470).

Almost surely, 2^68557544 is an apocalyptic number.

It is an amenable number.

68557544 is an abundant number, since it is smaller than the sum of its proper divisors (71673976).

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

68557544 is a wasteful number, since it uses less digits than its factorization.

68557544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779080 (or 779076 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The square root of 68557544 is about 8279.9483090174. The cubic root of 68557544 is about 409.2780155157.

The spelling of 68557544 in words is "sixty-eight million, five hundred fifty-seven thousand, five hundred forty-four".