400400145233423 has 2 divisors, whose sum is σ = 400400145233424. Its totient is φ = 400400145233422.

The previous prime is 400400145233401. The next prime is 400400145233441. The reversal of 400400145233423 is 324332541004004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400400145233423 - 2⁸ = 400400145233167 is a prime.

It is a super-2 number, since 2×400400145233423² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400400145263423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200200072616711 + 200200072616712.

It is an arithmetic number, because the mean of its divisors is an integer number (200200072616712).

Almost surely, 2^{400400145233423} is an apocalyptic number.

400400145233423 is a deficient number, since it is larger than the sum of its proper divisors (1).

400400145233423 is an equidigital number, since it uses as much as digits as its factorization.

400400145233423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 400400145233423 its reverse (324332541004004), we get a palindrome (724732686237427).

The spelling of 400400145233423 in words is "four hundred trillion, four hundred billion, one hundred forty-five million, two hundred thirty-three thousand, four hundred twenty-three".