40120606913 has 2 divisors, whose sum is σ = 40120606914. Its totient is φ = 40120606912.

The previous prime is 40120606873. The next prime is 40120606921. The reversal of 40120606913 is 31960602104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39971205184 + 149401729 = 199928^2 + 12223^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120606913 - 2³² = 35825639617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40120606913.

It is not a weakly prime, because it can be changed into another prime (40120606963) 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, 20060303456 + 20060303457.

It is an arithmetic number, because the mean of its divisors is an integer number (20060303457).

Almost surely, 2^40120606913 is an apocalyptic number.

It is an amenable number.

40120606913 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120606913 is an equidigital number, since it uses as much as digits as its factorization.

40120606913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 40120606913 in words is "forty billion, one hundred twenty million, six hundred six thousand, nine hundred thirteen".