39040518457 has 2 divisors, whose sum is σ = 39040518458. Its totient is φ = 39040518456.

The previous prime is 39040518449. The next prime is 39040518467. The reversal of 39040518457 is 75481504093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33212875536 + 5827642921 = 182244^2 + 76339^2 .

It is a cyclic number.

It is not a de Polignac number, because 39040518457 - 2³ = 39040518449 is a prime.

It is not a weakly prime, because it can be changed into another prime (39040518437) 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, 19520259228 + 19520259229.

It is an arithmetic number, because the mean of its divisors is an integer number (19520259229).

Almost surely, 2^39040518457 is an apocalyptic number.

It is an amenable number.

39040518457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39040518457 is an equidigital number, since it uses as much as digits as its factorization.

39040518457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 39040518457 in words is "thirty-nine billion, forty million, five hundred eighteen thousand, four hundred fifty-seven".