40689577009 has 2 divisors, whose sum is σ = 40689577010. Its totient is φ = 40689577008.

The previous prime is 40689577003. The next prime is 40689577037. The reversal of 40689577009 is 90077598604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21228490000 + 19461087009 = 145700^2 + 139503^2 .

It is a cyclic number.

It is not a de Polignac number, because 40689577009 - 2³ = 40689577001 is a prime.

It is not a weakly prime, because it can be changed into another prime (40689577001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344788504 + 20344788505.

It is an arithmetic number, because the mean of its divisors is an integer number (20344788505).

Almost surely, 2^40689577009 is an apocalyptic number.

It is an amenable number.

40689577009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689577009 is an equidigital number, since it uses as much as digits as its factorization.

40689577009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 40689577009 in words is "forty billion, six hundred eighty-nine million, five hundred seventy-seven thousand, nine".