40621132081 has 2 divisors, whose sum is σ = 40621132082. Its totient is φ = 40621132080.

The previous prime is 40621132073. The next prime is 40621132147. The reversal of 40621132081 is 18023112604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40584117025 + 37015056 = 201455^2 + 6084^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621132081 - 2³ = 40621132073 is a prime.

It is a super-2 number, since 2×40621132081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40621132381) 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 as a sum of consecutive naturals, namely, 20310566040 + 20310566041.

It is an arithmetic number, because the mean of its divisors is an integer number (20310566041).

Almost surely, 2^40621132081 is an apocalyptic number.

It is an amenable number.

40621132081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621132081 is an equidigital number, since it uses as much as digits as its factorization.

40621132081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 40621132081 its reverse (18023112604), we get a palindrome (58644244685).

The spelling of 40621132081 in words is "forty billion, six hundred twenty-one million, one hundred thirty-two thousand, eighty-one".