4443402021257 has 2 divisors, whose sum is σ = 4443402021258. Its totient is φ = 4443402021256.

The previous prime is 4443402021229. The next prime is 4443402021271. The reversal of 4443402021257 is 7521202043444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3471592494841 + 971809526416 = 1863221^2 + 985804^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443402021257 - 2²² = 4443397826953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4443402021257.

It is not a weakly prime, because it can be changed into another prime (4443402027257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221701010628 + 2221701010629.

It is an arithmetic number, because the mean of its divisors is an integer number (2221701010629).

Almost surely, 2^{4443402021257} is an apocalyptic number.

It is an amenable number.

4443402021257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443402021257 is an equidigital number, since it uses as much as digits as its factorization.

4443402021257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 38.

The spelling of 4443402021257 in words is "four trillion, four hundred forty-three billion, four hundred two million, twenty-one thousand, two hundred fifty-seven".