68545641 has 4 divisors (see below), whose sum is σ = 91394192. Its totient is φ = 45697092.

The previous prime is 68545637. The next prime is 68545643. The reversal of 68545641 is 14654586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68545641 - 2² = 68545637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68545641.

It is not an unprimeable number, because it can be changed into a prime (68545643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11424271 + ... + 11424276.

It is an arithmetic number, because the mean of its divisors is an integer number (22848548).

Almost surely, 2^68545641 is an apocalyptic number.

It is an amenable number.

68545641 is a deficient number, since it is larger than the sum of its proper divisors (22848551).

68545641 is a wasteful number, since it uses less digits than its factorization.

68545641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22848550.

The product of its digits is 115200, while the sum is 39.

The square root of 68545641 is about 8279.2294931352. The cubic root of 68545641 is about 409.2543277837.

The spelling of 68545641 in words is "sixty-eight million, five hundred forty-five thousand, six hundred forty-one".