10165026721 has 8 divisors (see below), whose sum is σ = 10609427304. Its totient is φ = 9729982080.

The previous prime is 10165026713. The next prime is 10165026731. The reversal of 10165026721 is 12762056101.

It can be written as a sum of positive squares in 4 ways, for example, as 2449161121 + 7715865600 = 49489^2 + 87840^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10165026721 - 2³ = 10165026713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10165026731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336766 + ... + 2341111.

It is an arithmetic number, because the mean of its divisors is an integer number (1326178413).

Almost surely, 2^10165026721 is an apocalyptic number.

It is an amenable number.

10165026721 is a deficient number, since it is larger than the sum of its proper divisors (444400583).

10165026721 is an equidigital number, since it uses as much as digits as its factorization.

10165026721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677971.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 10165026721 in words is "ten billion, one hundred sixty-five million, twenty-six thousand, seven hundred twenty-one".