4357444022721 has 12 divisors (see below), whose sum is σ = 6412842147348. Its totient is φ = 2850152064864.

The previous prime is 4357444022707. The next prime is 4357444022759. The reversal of 4357444022721 is 1272204447534.

4357444022721 is a `hidden beast` number, since 4 + 3 + 574 + 4 + 4 + 0 + 2 + 2 + 72 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2612865342096 + 1744578680625 = 1616436^2 + 1320825^2 .

It is not a de Polignac number, because 4357444022721 - 2⁷ = 4357444022593 is a prime.

It is a super-2 number, since 2×4357444022721² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4357444022621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4567550910 + ... + 4567551863.

It is an arithmetic number, because the mean of its divisors is an integer number (534403512279).

Almost surely, 2^{4357444022721} is an apocalyptic number.

It is an amenable number.

4357444022721 is a deficient number, since it is larger than the sum of its proper divisors (2055398124627).

4357444022721 is a wasteful number, since it uses less digits than its factorization.

4357444022721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9135102832 (or 9135102829 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 45.

The spelling of 4357444022721 in words is "four trillion, three hundred fifty-seven billion, four hundred forty-four million, twenty-two thousand, seven hundred twenty-one".