1004440643953 has 2 divisors, whose sum is σ = 1004440643954. Its totient is φ = 1004440643952.

The previous prime is 1004440643879. The next prime is 1004440644017. The reversal of 1004440643953 is 3593460444001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576714179889 + 427726464064 = 759417^2 + 654008^2 .

It is an emirp because it is prime and its reverse (3593460444001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004440643953 - 2²¹ = 1004438546801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1004440644953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502220321976 + 502220321977.

It is an arithmetic number, because the mean of its divisors is an integer number (502220321977).

Almost surely, 2^{1004440643953} is an apocalyptic number.

It is an amenable number.

1004440643953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004440643953 is an equidigital number, since it uses as much as digits as its factorization.

1004440643953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 1004440643953 in words is "one trillion, four billion, four hundred forty million, six hundred forty-three thousand, nine hundred fifty-three".