68585520641 has 8 divisors (see below), whose sum is σ = 75046615968. Its totient is φ = 62162100000.

The previous prime is 68585520587. The next prime is 68585520673. The reversal of 68585520641 is 14602558586.

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

It is not a de Polignac number, because 68585520641 - 2²² = 68581326337 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 68585520641.

It is not an unprimeable number, because it can be changed into a prime (68585520691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9414860 + ... + 9422141.

It is an arithmetic number, because the mean of its divisors is an integer number (9380826996).

Almost surely, 2^68585520641 is an apocalyptic number.

It is an amenable number.

68585520641 is a deficient number, since it is larger than the sum of its proper divisors (6461095327).

68585520641 is a wasteful number, since it uses less digits than its factorization.

68585520641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18837343.

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 68585520641 in words is "sixty-eight billion, five hundred eighty-five million, five hundred twenty thousand, six hundred forty-one".