40325541021521 has 12 divisors (see below), whose sum is σ = 47794384009332. Its totient is φ = 33912584360928.

The previous prime is 40325541021499. The next prime is 40325541021523. The reversal of 40325541021521 is 12512014552304.

It can be written as a sum of positive squares in 2 ways, for example, as 29057005107025 + 11268535914496 = 5390455^2 + 3356864^2 .

It is not a de Polignac number, because 40325541021521 - 2⁴² = 35927494510417 is a prime.

It is a super-2 number, since 2×40325541021521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40325541021523) 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 11 ways as a sum of consecutive naturals, for example, 7763867450 + ... + 7763872643.

It is an arithmetic number, because the mean of its divisors is an integer number (3982865334111).

Almost surely, 2^{40325541021521} is an apocalyptic number.

It is an amenable number.

40325541021521 is a deficient number, since it is larger than the sum of its proper divisors (7468842987811).

40325541021521 is a wasteful number, since it uses less digits than its factorization.

40325541021521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15527740160 (or 15527740153 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 40325541021521 its reverse (12512014552304), we get a palindrome (52837555573825).

The spelling of 40325541021521 in words is "forty trillion, three hundred twenty-five billion, five hundred forty-one million, twenty-one thousand, five hundred twenty-one".