68051510641 has 4 divisors (see below), whose sum is σ = 68072866672. Its totient is φ = 68030154612.

The previous prime is 68051510627. The next prime is 68051510669. The reversal of 68051510641 is 14601515086.

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 a cyclic number.

It is not a de Polignac number, because 68051510641 - 2¹⁵ = 68051477873 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 68051510641.

It is not an unprimeable number, because it can be changed into a prime (68051510041) 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, 10673235 + ... + 10679608.

It is an arithmetic number, because the mean of its divisors is an integer number (17018216668).

Almost surely, 2^68051510641 is an apocalyptic number.

It is an amenable number.

68051510641 is a deficient number, since it is larger than the sum of its proper divisors (21356031).

68051510641 is a wasteful number, since it uses less digits than its factorization.

68051510641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21356030.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 68051510641 in words is "sixty-eight billion, fifty-one million, five hundred ten thousand, six hundred forty-one".