68781856 has 48 divisors (see below), whose sum is σ = 159098688. Its totient is φ = 28857600.

The previous prime is 68781793. The next prime is 68781871. The reversal of 68781856 is 65818786.

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, 2940 + ... + 12091.

It is an arithmetic number, because the mean of its divisors is an integer number (3314556).

Almost surely, 2^68781856 is an apocalyptic number.

It is an amenable number.

68781856 is an abundant number, since it is smaller than the sum of its proper divisors (90316832).

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

68781856 is a wasteful number, since it uses less digits than its factorization.

68781856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15065 (or 15057 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 68781856 is about 8293.4827424912. The cubic root of 68781856 is about 409.7238989807.

The spelling of 68781856 in words is "sixty-eight million, seven hundred eighty-one thousand, eight hundred fifty-six".