40120428449 has 2 divisors, whose sum is σ = 40120428450. Its totient is φ = 40120428448.

The previous prime is 40120428431. The next prime is 40120428527. The reversal of 40120428449 is 94482402104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23539230625 + 16581197824 = 153425^2 + 128768^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120428449 - 2⁸ = 40120428193 is a prime.

It is not a weakly prime, because it can be changed into another prime (40128428449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060214224 + 20060214225.

It is an arithmetic number, because the mean of its divisors is an integer number (20060214225).

Almost surely, 2^40120428449 is an apocalyptic number.

It is an amenable number.

40120428449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120428449 is an equidigital number, since it uses as much as digits as its factorization.

40120428449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 40120428449 in words is "forty billion, one hundred twenty million, four hundred twenty-eight thousand, four hundred forty-nine".