40445215541 has 2 divisors, whose sum is σ = 40445215542. Its totient is φ = 40445215540.

The previous prime is 40445215537. The next prime is 40445215553. The reversal of 40445215541 is 14551254404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34501576516 + 5943639025 = 185746^2 + 77095^2 .

It is a cyclic number.

It is not a de Polignac number, because 40445215541 - 2² = 40445215537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40445215571) 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, 20222607770 + 20222607771.

It is an arithmetic number, because the mean of its divisors is an integer number (20222607771).

Almost surely, 2^40445215541 is an apocalyptic number.

It is an amenable number.

40445215541 is a deficient number, since it is larger than the sum of its proper divisors (1).

40445215541 is an equidigital number, since it uses as much as digits as its factorization.

40445215541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 40445215541 its reverse (14551254404), we get a palindrome (54996469945).

The spelling of 40445215541 in words is "forty billion, four hundred forty-five million, two hundred fifteen thousand, five hundred forty-one".