40511041381 has 2 divisors, whose sum is σ = 40511041382. Its totient is φ = 40511041380.

The previous prime is 40511041379. The next prime is 40511041411. The reversal of 40511041381 is 18314011504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32199072481 + 8311968900 = 179441^2 + 91170^2 .

It is a cyclic number.

It is not a de Polignac number, because 40511041381 - 2¹ = 40511041379 is a prime.

It is a super-2 number, since 2×40511041381² (a number of 22 digits) contains 22 as substring.

Together with 40511041379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40511041981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20255520690 + 20255520691.

It is an arithmetic number, because the mean of its divisors is an integer number (20255520691).

Almost surely, 2^40511041381 is an apocalyptic number.

It is an amenable number.

40511041381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40511041381 is an equidigital number, since it uses as much as digits as its factorization.

40511041381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 40511041381 its reverse (18314011504), we get a palindrome (58825052885).

The spelling of 40511041381 in words is "forty billion, five hundred eleven million, forty-one thousand, three hundred eighty-one".