10078795721 has 4 divisors (see below), whose sum is σ = 10268961732. Its totient is φ = 9888629712.

The previous prime is 10078795711. The next prime is 10078795723. The reversal of 10078795721 is 12759787001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6672439225 + 3406356496 = 81685^2 + 58364^2 .

It is a cyclic number.

It is not a de Polignac number, because 10078795721 - 2¹⁰ = 10078794697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10078795723) 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 3 ways as a sum of consecutive naturals, for example, 95082926 + ... + 95083031.

It is an arithmetic number, because the mean of its divisors is an integer number (2567240433).

Almost surely, 2^10078795721 is an apocalyptic number.

It is an amenable number.

10078795721 is a deficient number, since it is larger than the sum of its proper divisors (190166011).

10078795721 is an equidigital number, since it uses as much as digits as its factorization.

10078795721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190166010.

The product of its (nonzero) digits is 246960, while the sum is 47.

The spelling of 10078795721 in words is "ten billion, seventy-eight million, seven hundred ninety-five thousand, seven hundred twenty-one".