40443231449 has 2 divisors, whose sum is σ = 40443231450. Its totient is φ = 40443231448.

The previous prime is 40443231431. The next prime is 40443231461. The reversal of 40443231449 is 94413234404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39221029849 + 1222201600 = 198043^2 + 34960^2 .

It is a cyclic number.

It is not a de Polignac number, because 40443231449 - 2¹⁶ = 40443165913 is a prime.

It is not a weakly prime, because it can be changed into another prime (40443231419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20221615724 + 20221615725.

It is an arithmetic number, because the mean of its divisors is an integer number (20221615725).

Almost surely, 2^40443231449 is an apocalyptic number.

It is an amenable number.

40443231449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40443231449 is an equidigital number, since it uses as much as digits as its factorization.

40443231449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 40443231449 in words is "forty billion, four hundred forty-three million, two hundred thirty-one thousand, four hundred forty-nine".