400011042042473 has 2 divisors, whose sum is σ = 400011042042474. Its totient is φ = 400011042042472.

The previous prime is 400011042042431. The next prime is 400011042042499. The reversal of 400011042042473 is 374240240110004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393174448705129 + 6836593337344 = 19828627^2 + 2614688^2 .

It is a cyclic number.

It is not a de Polignac number, because 400011042042473 - 2⁴⁶ = 329642297864809 is a prime.

It is not a weakly prime, because it can be changed into another prime (400011042042173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200005521021236 + 200005521021237.

It is an arithmetic number, because the mean of its divisors is an integer number (200005521021237).

Almost surely, 2^{400011042042473} is an apocalyptic number.

It is an amenable number.

400011042042473 is a deficient number, since it is larger than the sum of its proper divisors (1).

400011042042473 is an equidigital number, since it uses as much as digits as its factorization.

400011042042473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 32.

Adding to 400011042042473 its reverse (374240240110004), we get a palindrome (774251282152477).

The spelling of 400011042042473 in words is "four hundred trillion, eleven billion, forty-two million, forty-two thousand, four hundred seventy-three".