40505303521 has 16 divisors (see below), whose sum is σ = 44074727424. Its totient is φ = 37069035264.

The previous prime is 40505303507. The next prime is 40505303533. The reversal of 40505303521 is 12530350504.

It is a cyclic number.

It is not a de Polignac number, because 40505303521 - 2¹³ = 40505295329 is a prime.

It is a super-2 number, since 2×40505303521² (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 40505303521.

It is not an unprimeable number, because it can be changed into a prime (40505301521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1026666 + ... + 1065388.

It is an arithmetic number, because the mean of its divisors is an integer number (2754670464).

Almost surely, 2^40505303521 is an apocalyptic number.

It is an amenable number.

40505303521 is a deficient number, since it is larger than the sum of its proper divisors (3569423903).

40505303521 is a wasteful number, since it uses less digits than its factorization.

40505303521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40440.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 40505303521 in words is "forty billion, five hundred five million, three hundred three thousand, five hundred twenty-one".