40041135521 has 4 divisors (see below), whose sum is σ = 42396496452. Its totient is φ = 37685774592.

The previous prime is 40041135499. The next prime is 40041135529. The reversal of 40041135521 is 12553114004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33676287121 + 6364848400 = 183511^2 + 79780^2 .

It is a cyclic number.

It is not a de Polignac number, because 40041135521 - 2⁶ = 40041135457 is a prime.

It is a super-2 number, since 2×40041135521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40041135529) 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 3 ways as a sum of consecutive naturals, for example, 1177680440 + ... + 1177680473.

It is an arithmetic number, because the mean of its divisors is an integer number (10599124113).

Almost surely, 2^40041135521 is an apocalyptic number.

It is an amenable number.

40041135521 is a deficient number, since it is larger than the sum of its proper divisors (2355360931).

40041135521 is a wasteful number, since it uses less digits than its factorization.

40041135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355360930.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 40041135521 its reverse (12553114004), we get a palindrome (52594249525).

The spelling of 40041135521 in words is "forty billion, forty-one million, one hundred thirty-five thousand, five hundred twenty-one".