400044004057 has 2 divisors, whose sum is σ = 400044004058. Its totient is φ = 400044004056.

The previous prime is 400044004037. The next prime is 400044004079. The reversal of 400044004057 is 750400440004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307637731801 + 92406272256 = 554651^2 + 303984^2 .

It is a cyclic number.

It is not a de Polignac number, because 400044004057 - 2¹⁹ = 400043479769 is a prime.

It is not a weakly prime, because it can be changed into another prime (400044004037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200022002028 + 200022002029.

It is an arithmetic number, because the mean of its divisors is an integer number (200022002029).

Almost surely, 2^400044004057 is an apocalyptic number.

It is an amenable number.

400044004057 is a deficient number, since it is larger than the sum of its proper divisors (1).

400044004057 is an equidigital number, since it uses as much as digits as its factorization.

400044004057 is an evil number, because the sum of its binary digits is even.

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

The spelling of 400044004057 in words is "four hundred billion, forty-four million, four thousand, fifty-seven".