400051205044551 has 6 divisors (see below), whose sum is σ = 577851740619920. Its totient is φ = 266700803363028.

The previous prime is 400051205044501. The next prime is 400051205044583. The reversal of 400051205044551 is 155440502150004.

400051205044551 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 5 + 1 + 205 + 0 + 445 + 5 + 1 = 666.

It is not a de Polignac number, because 400051205044551 - 2⁴⁵ = 364866832955719 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 (400051205044501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22225066946911 + ... + 22225066946928.

Almost surely, 2^{400051205044551} is an apocalyptic number.

400051205044551 is a deficient number, since it is larger than the sum of its proper divisors (177800535575369).

400051205044551 is a wasteful number, since it uses less digits than its factorization.

400051205044551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44450133893845 (or 44450133893842 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 400051205044551 its reverse (155440502150004), we get a palindrome (555491707194555).

The spelling of 400051205044551 in words is "four hundred trillion, fifty-one billion, two hundred five million, forty-four thousand, five hundred fifty-one".