40315394081 has 2 divisors, whose sum is σ = 40315394082. Its totient is φ = 40315394080.

The previous prime is 40315394057. The next prime is 40315394099. The reversal of 40315394081 is 18049351304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31343515681 + 8971878400 = 177041^2 + 94720^2 .

It is a cyclic number.

It is not a de Polignac number, because 40315394081 - 2¹⁰ = 40315393057 is a prime.

It is a super-2 number, since 2×40315394081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40315394281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20157697040 + 20157697041.

It is an arithmetic number, because the mean of its divisors is an integer number (20157697041).

Almost surely, 2^40315394081 is an apocalyptic number.

It is an amenable number.

40315394081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40315394081 is an equidigital number, since it uses as much as digits as its factorization.

40315394081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 40315394081 in words is "forty billion, three hundred fifteen million, three hundred ninety-four thousand, eighty-one".