40852405309 has 2 divisors, whose sum is σ = 40852405310. Its totient is φ = 40852405308.

The previous prime is 40852405273. The next prime is 40852405313. The reversal of 40852405309 is 90350425804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22224250084 + 18628155225 = 149078^2 + 136485^2 .

It is a cyclic number.

It is not a de Polignac number, because 40852405309 - 2¹¹ = 40852403261 is a prime.

It is a super-2 number, since 2×40852405309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40852402309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20426202654 + 20426202655.

It is an arithmetic number, because the mean of its divisors is an integer number (20426202655).

Almost surely, 2^40852405309 is an apocalyptic number.

It is an amenable number.

40852405309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40852405309 is an equidigital number, since it uses as much as digits as its factorization.

40852405309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 40852405309 in words is "forty billion, eight hundred fifty-two million, four hundred five thousand, three hundred nine".