400406640006 has 16 divisors (see below), whose sum is σ = 826645966848. Its totient is φ = 129163432200.

The previous prime is 400406639953. The next prime is 400406640083. The reversal of 400406640006 is 600046604004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076361750 + ... + 1076362121.

It is an arithmetic number, because the mean of its divisors is an integer number (51665372928).

Almost surely, 2^400406640006 is an apocalyptic number.

400406640006 is an abundant number, since it is smaller than the sum of its proper divisors (426239326842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400406640006 is a wasteful number, since it uses less digits than its factorization.

400406640006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152723907.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 400406640006 in words is "four hundred billion, four hundred six million, six hundred forty thousand, six".