68161641 has 8 divisors (see below), whose sum is σ = 91221120. Its totient is φ = 45271632.

The previous prime is 68161637. The next prime is 68161661. The reversal of 68161641 is 14616186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68161641 - 2² = 68161637 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68161601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41425 + ... + 43038.

It is an arithmetic number, because the mean of its divisors is an integer number (11402640).

Almost surely, 2^68161641 is an apocalyptic number.

It is an amenable number.

68161641 is a deficient number, since it is larger than the sum of its proper divisors (23059479).

68161641 is a wasteful number, since it uses less digits than its factorization.

68161641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84735.

The product of its digits is 6912, while the sum is 33.

The square root of 68161641 is about 8256.0063590092. The cubic root of 68161641 is about 408.4886674140.

The spelling of 68161641 in words is "sixty-eight million, one hundred sixty-one thousand, six hundred forty-one".