40017372123013 has 2 divisors, whose sum is σ = 40017372123014. Its totient is φ = 40017372123012.

The previous prime is 40017372123007. The next prime is 40017372123101. The reversal of 40017372123013 is 31032127371004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37773721637089 + 2243650485924 = 6146033^2 + 1497882^2 .

It is a cyclic number.

It is not a de Polignac number, because 40017372123013 - 2⁹ = 40017372122501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40017372123013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40017372123613) 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, 20008686061506 + 20008686061507.

It is an arithmetic number, because the mean of its divisors is an integer number (20008686061507).

Almost surely, 2^{40017372123013} is an apocalyptic number.

It is an amenable number.

40017372123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40017372123013 is an equidigital number, since it uses as much as digits as its factorization.

40017372123013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

Adding to 40017372123013 its reverse (31032127371004), we get a palindrome (71049499494017).

The spelling of 40017372123013 in words is "forty trillion, seventeen billion, three hundred seventy-two million, one hundred twenty-three thousand, thirteen".