40434440257 has 2 divisors, whose sum is σ = 40434440258. Its totient is φ = 40434440256.

The previous prime is 40434440173. The next prime is 40434440261. The reversal of 40434440257 is 75204443404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35618635441 + 4815804816 = 188729^2 + 69396^2 .

It is a cyclic number.

It is not a de Polignac number, because 40434440257 - 2⁷ = 40434440129 is a prime.

It is not a weakly prime, because it can be changed into another prime (40434446257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217220128 + 20217220129.

It is an arithmetic number, because the mean of its divisors is an integer number (20217220129).

Almost surely, 2^40434440257 is an apocalyptic number.

It is an amenable number.

40434440257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40434440257 is an equidigital number, since it uses as much as digits as its factorization.

40434440257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 37.

The spelling of 40434440257 in words is "forty billion, four hundred thirty-four million, four hundred forty thousand, two hundred fifty-seven".