4057834500721 has 4 divisors (see below), whose sum is σ = 4124356377844. Its totient is φ = 3991312623600.

The previous prime is 4057834500703. The next prime is 4057834500763. The reversal of 4057834500721 is 1270054387504.

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 1879586160400 + 2178248340321 = 1370980^2 + 1475889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4057834500721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4057834500791) 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, 33260938470 + ... + 33260938591.

It is an arithmetic number, because the mean of its divisors is an integer number (1031089094461).

Almost surely, 2^{4057834500721} is an apocalyptic number.

It is an amenable number.

4057834500721 is a deficient number, since it is larger than the sum of its proper divisors (66521877123).

4057834500721 is an equidigital number, since it uses as much as digits as its factorization.

4057834500721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66521877122.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 4057834500721 in words is "four trillion, fifty-seven billion, eight hundred thirty-four million, five hundred thousand, seven hundred twenty-one".