400256033005 has 4 divisors (see below), whose sum is σ = 480307239612. Its totient is φ = 320204826400.

The previous prime is 400256033003. The next prime is 400256033011. The reversal of 400256033005 is 500330652004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255269478564 + 144986554441 = 505242^2 + 380771^2 .

It is not a de Polignac number, because 400256033005 - 2¹ = 400256033003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400256033003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40025603296 + ... + 40025603305.

It is an arithmetic number, because the mean of its divisors is an integer number (120076809903).

Almost surely, 2^400256033005 is an apocalyptic number.

It is an amenable number.

400256033005 is a deficient number, since it is larger than the sum of its proper divisors (80051206607).

400256033005 is an equidigital number, since it uses as much as digits as its factorization.

400256033005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80051206606.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 400256033005 its reverse (500330652004), we get a palindrome (900586685009).

The spelling of 400256033005 in words is "four hundred billion, two hundred fifty-six million, thirty-three thousand, five".