40557521449 has 2 divisors, whose sum is σ = 40557521450. Its totient is φ = 40557521448.

The previous prime is 40557521441. The next prime is 40557521453. The reversal of 40557521449 is 94412575504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36881282025 + 3676239424 = 192045^2 + 60632^2 .

It is a cyclic number.

It is not a de Polignac number, because 40557521449 - 2³ = 40557521441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40557521399 and 40557521408.

It is not a weakly prime, because it can be changed into another prime (40557521441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278760724 + 20278760725.

It is an arithmetic number, because the mean of its divisors is an integer number (20278760725).

Almost surely, 2^40557521449 is an apocalyptic number.

It is an amenable number.

40557521449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557521449 is an equidigital number, since it uses as much as digits as its factorization.

40557521449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 40557521449 in words is "forty billion, five hundred fifty-seven million, five hundred twenty-one thousand, four hundred forty-nine".