40400044057 has 2 divisors, whose sum is σ = 40400044058. Its totient is φ = 40400044056.

The previous prime is 40400044039. The next prime is 40400044063. The reversal of 40400044057 is 75044000404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28575873936 + 11824170121 = 169044^2 + 108739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40400044057 is a prime.

It is not a weakly prime, because it can be changed into another prime (40400044067) 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, 20200022028 + 20200022029.

It is an arithmetic number, because the mean of its divisors is an integer number (20200022029).

Almost surely, 2^40400044057 is an apocalyptic number.

It is an amenable number.

40400044057 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400044057 is an equidigital number, since it uses as much as digits as its factorization.

40400044057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 28.

The spelling of 40400044057 in words is "forty billion, four hundred million, forty-four thousand, fifty-seven".