40542403381 has 2 divisors, whose sum is σ = 40542403382. Its totient is φ = 40542403380.

The previous prime is 40542403373. The next prime is 40542403417. The reversal of 40542403381 is 18330424504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36505834225 + 4036569156 = 191065^2 + 63534^2 .

It is a cyclic number.

It is not a de Polignac number, because 40542403381 - 2³ = 40542403373 is a prime.

It is a super-2 number, since 2×40542403381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40542403481) 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 as a sum of consecutive naturals, namely, 20271201690 + 20271201691.

It is an arithmetic number, because the mean of its divisors is an integer number (20271201691).

Almost surely, 2^40542403381 is an apocalyptic number.

It is an amenable number.

40542403381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40542403381 is an equidigital number, since it uses as much as digits as its factorization.

40542403381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 40542403381 its reverse (18330424504), we get a palindrome (58872827885).

The spelling of 40542403381 in words is "forty billion, five hundred forty-two million, four hundred three thousand, three hundred eighty-one".