40551244064 has 72 divisors (see below), whose sum is σ = 83675613420. Its totient is φ = 19343351808.

The previous prime is 40551244061. The next prime is 40551244079. The reversal of 40551244064 is 46044215504.

It can be written as a sum of positive squares in 2 ways, for example, as 30587211664 + 9964032400 = 174892^2 + 99820^2 .

It is not an unprimeable number, because it can be changed into a prime (40551244061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6920624 + ... + 6926480.

Almost surely, 2^40551244064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40551244064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41837806710).

40551244064 is an abundant number, since it is smaller than the sum of its proper divisors (43124369356).

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

40551244064 is a wasteful number, since it uses less digits than its factorization.

40551244064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6291 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 40551244064 its reverse (46044215504), we get a palindrome (86595459568).

The spelling of 40551244064 in words is "forty billion, five hundred fifty-one million, two hundred forty-four thousand, sixty-four".