40555898869 has 2 divisors, whose sum is σ = 40555898870. Its totient is φ = 40555898868.

The previous prime is 40555898857. The next prime is 40555898899. The reversal of 40555898869 is 96889855504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40310600625 + 245298244 = 200775^2 + 15662^2 .

It is a cyclic number.

It is not a de Polignac number, because 40555898869 - 2¹⁷ = 40555767797 is a prime.

It is a super-2 number, since 2×40555898869² (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 (40555898809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277949434 + 20277949435.

It is an arithmetic number, because the mean of its divisors is an integer number (20277949435).

Almost surely, 2^40555898869 is an apocalyptic number.

It is an amenable number.

40555898869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555898869 is an equidigital number, since it uses as much as digits as its factorization.

40555898869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416000, while the sum is 67.

The spelling of 40555898869 in words is "forty billion, five hundred fifty-five million, eight hundred ninety-eight thousand, eight hundred sixty-nine".