400011042842431 has 2 divisors, whose sum is σ = 400011042842432. Its totient is φ = 400011042842430.

The previous prime is 400011042842429. The next prime is 400011042842479. The reversal of 400011042842431 is 134248240110004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400011042842431 - 2¹ = 400011042842429 is a prime.

It is a super-2 number, since 2×400011042842431² (a number of 30 digits) contains 22 as substring.

Together with 400011042842429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400011042842491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200005521421215 + 200005521421216.

It is an arithmetic number, because the mean of its divisors is an integer number (200005521421216).

Almost surely, 2^{400011042842431} is an apocalyptic number.

400011042842431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400011042842431 is an equidigital number, since it uses as much as digits as its factorization.

400011042842431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 34.

Adding to 400011042842431 its reverse (134248240110004), we get a palindrome (534259282952435).

The spelling of 400011042842431 in words is "four hundred trillion, eleven billion, forty-two million, eight hundred forty-two thousand, four hundred thirty-one".