40523140123 has 2 divisors, whose sum is σ = 40523140124. Its totient is φ = 40523140122.

The previous prime is 40523140087. The next prime is 40523140171. The reversal of 40523140123 is 32104132504.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40523140123 is a prime.

It is not a weakly prime, because it can be changed into another prime (40523149123) 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, 20261570061 + 20261570062.

It is an arithmetic number, because the mean of its divisors is an integer number (20261570062).

Almost surely, 2^40523140123 is an apocalyptic number.

40523140123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40523140123 is an equidigital number, since it uses as much as digits as its factorization.

40523140123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 40523140123 its reverse (32104132504), we get a palindrome (72627272627).

The spelling of 40523140123 in words is "forty billion, five hundred twenty-three million, one hundred forty thousand, one hundred twenty-three".