40268320181 has 2 divisors, whose sum is σ = 40268320182. Its totient is φ = 40268320180.

The previous prime is 40268320177. The next prime is 40268320207. The reversal of 40268320181 is 18102386204.

40268320181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39996400081 + 271920100 = 199991^2 + 16490^2 .

It is a cyclic number.

It is not a de Polignac number, because 40268320181 - 2² = 40268320177 is a prime.

It is a super-2 number, since 2×40268320181² (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 (40268320171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20134160090 + 20134160091.

It is an arithmetic number, because the mean of its divisors is an integer number (20134160091).

Almost surely, 2^40268320181 is an apocalyptic number.

It is an amenable number.

40268320181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40268320181 is an equidigital number, since it uses as much as digits as its factorization.

40268320181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 40268320181 in words is "forty billion, two hundred sixty-eight million, three hundred twenty thousand, one hundred eighty-one".