40440355551 has 12 divisors (see below), whose sum is σ = 60428117880. Its totient is φ = 26030573520.

The previous prime is 40440355523. The next prime is 40440355577. The reversal of 40440355551 is 15555304404.

It is not a de Polignac number, because 40440355551 - 2⁵ = 40440355519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440355511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77471685 + ... + 77472206.

It is an arithmetic number, because the mean of its divisors is an integer number (5035676490).

Almost surely, 2^40440355551 is an apocalyptic number.

40440355551 is a deficient number, since it is larger than the sum of its proper divisors (19987762329).

40440355551 is a wasteful number, since it uses less digits than its factorization.

40440355551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154943926 (or 154943923 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 40440355551 its reverse (15555304404), we get a palindrome (55995659955).

It can be divided in two parts, 404403 and 55551, that added together give a palindrome (459954).

The spelling of 40440355551 in words is "forty billion, four hundred forty million, three hundred fifty-five thousand, five hundred fifty-one".