40540440215123 has 2 divisors, whose sum is σ = 40540440215124. Its totient is φ = 40540440215122.

The previous prime is 40540440215113. The next prime is 40540440215141. The reversal of 40540440215123 is 32151204404504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40540440215123 - 2⁶ = 40540440215059 is a prime.

It is not a weakly prime, because it can be changed into another prime (40540440215113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20270220107561 + 20270220107562.

It is an arithmetic number, because the mean of its divisors is an integer number (20270220107562).

Almost surely, 2^{40540440215123} is an apocalyptic number.

40540440215123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40540440215123 is an equidigital number, since it uses as much as digits as its factorization.

40540440215123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 40540440215123 its reverse (32151204404504), we get a palindrome (72691644619627).

The spelling of 40540440215123 in words is "forty trillion, five hundred forty billion, four hundred forty million, two hundred fifteen thousand, one hundred twenty-three".