40345540993 has 2 divisors, whose sum is σ = 40345540994. Its totient is φ = 40345540992.

The previous prime is 40345540987. The next prime is 40345540997. The reversal of 40345540993 is 39904554304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195037169 + 150503824 = 200487^2 + 12268^2 .

It is a cyclic number.

It is not a de Polignac number, because 40345540993 - 2²⁹ = 39808670081 is a prime.

It is not a weakly prime, because it can be changed into another prime (40345540997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20172770496 + 20172770497.

It is an arithmetic number, because the mean of its divisors is an integer number (20172770497).

Almost surely, 2^40345540993 is an apocalyptic number.

It is an amenable number.

40345540993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40345540993 is an equidigital number, since it uses as much as digits as its factorization.

40345540993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 40345540993 in words is "forty billion, three hundred forty-five million, five hundred forty thousand, nine hundred ninety-three".