9057393315721 has 4 divisors (see below), whose sum is σ = 9058167397444. Its totient is φ = 9056619234000.

The previous prime is 9057393315709. The next prime is 9057393315757. The reversal of 9057393315721 is 1275133937509.

9057393315721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5260211055225 + 3797182260496 = 2293515^2 + 1948636^2 .

It is a cyclic number.

It is not a de Polignac number, because 9057393315721 - 2¹¹ = 9057393313673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9057393315781) 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, 387023310 + ... + 387046711.

It is an arithmetic number, because the mean of its divisors is an integer number (2264541849361).

Almost surely, 2^{9057393315721} is an apocalyptic number.

It is an amenable number.

9057393315721 is a deficient number, since it is larger than the sum of its proper divisors (774081723).

9057393315721 is a wasteful number, since it uses less digits than its factorization.

9057393315721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774081722.

The product of its (nonzero) digits is 5358150, while the sum is 55.

The spelling of 9057393315721 in words is "nine trillion, fifty-seven billion, three hundred ninety-three million, three hundred fifteen thousand, seven hundred twenty-one".