68256644 has 12 divisors (see below), whose sum is σ = 119517468. Its totient is φ = 34108800.

The previous prime is 68256641. The next prime is 68256647. The reversal of 68256644 is 44665286.

It is an interprime number because it is at equal distance from previous prime (68256641) and next prime (68256647).

It can be written as a sum of positive squares in 2 ways, for example, as 50951044 + 17305600 = 7138^2 + 4160^2 .

It is not an unprimeable number, because it can be changed into a prime (68256641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5384 + ... + 12864.

It is an arithmetic number, because the mean of its divisors is an integer number (9959789).

Almost surely, 2^68256644 is an apocalyptic number.

It is an amenable number.

68256644 is a deficient number, since it is larger than the sum of its proper divisors (51260824).

68256644 is a wasteful number, since it uses less digits than its factorization.

68256644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9766 (or 9764 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 68256644 is about 8261.7579243161. The cubic root of 68256644 is about 408.6783617560.

The spelling of 68256644 in words is "sixty-eight million, two hundred fifty-six thousand, six hundred forty-four".