40618469569 has 2 divisors, whose sum is σ = 40618469570. Its totient is φ = 40618469568.

The previous prime is 40618469561. The next prime is 40618469581. The reversal of 40618469569 is 96596481604.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40618371600 + 97969 = 201540^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 40618469569 - 2³ = 40618469561 is a prime.

It is a super-2 number, since 2×40618469569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40618469561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20309234784 + 20309234785.

It is an arithmetic number, because the mean of its divisors is an integer number (20309234785).

Almost surely, 2^40618469569 is an apocalyptic number.

It is an amenable number.

40618469569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40618469569 is an equidigital number, since it uses as much as digits as its factorization.

40618469569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 40618469569 in words is "forty billion, six hundred eighteen million, four hundred sixty-nine thousand, five hundred sixty-nine".