40451033521 has 8 divisors (see below), whose sum is σ = 40977941120. Its totient is φ = 39924497808.

The previous prime is 40451033473. The next prime is 40451033533. The reversal of 40451033521 is 12533015404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40451033521 - 2⁹ = 40451033009 is a prime.

It is a super-2 number, since 2×40451033521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40451033521.

It is not an unprimeable number, because it can be changed into a prime (40451033561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129430 + ... + 312496.

It is an arithmetic number, because the mean of its divisors is an integer number (5122242640).

Almost surely, 2^40451033521 is an apocalyptic number.

It is an amenable number.

40451033521 is a deficient number, since it is larger than the sum of its proper divisors (526907599).

40451033521 is a wasteful number, since it uses less digits than its factorization.

40451033521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185943.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 40451033521 its reverse (12533015404), we get a palindrome (52984048925).

The spelling of 40451033521 in words is "forty billion, four hundred fifty-one million, thirty-three thousand, five hundred twenty-one".