40165213129 has 2 divisors, whose sum is σ = 40165213130. Its totient is φ = 40165213128.

The previous prime is 40165213087. The next prime is 40165213159. The reversal of 40165213129 is 92131256104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20406693904 + 19758519225 = 142852^2 + 140565^2 .

It is a cyclic number.

It is not a de Polignac number, because 40165213129 - 2⁹ = 40165212617 is a prime.

It is a super-2 number, since 2×40165213129² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40165213094 and 40165213103.

It is not a weakly prime, because it can be changed into another prime (40165213159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20082606564 + 20082606565.

It is an arithmetic number, because the mean of its divisors is an integer number (20082606565).

Almost surely, 2^40165213129 is an apocalyptic number.

It is an amenable number.

40165213129 is a deficient number, since it is larger than the sum of its proper divisors (1).

40165213129 is an equidigital number, since it uses as much as digits as its factorization.

40165213129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 40165213129 in words is "forty billion, one hundred sixty-five million, two hundred thirteen thousand, one hundred twenty-nine".