40998568689 has 30 divisors (see below), whose sum is σ = 66318329286. Its totient is φ = 25229880000.

The previous prime is 40998568673. The next prime is 40998568693. The reversal of 40998568689 is 98686589904.

40998568689 is a `hidden beast` number, since 409 + 9 + 85 + 68 + 6 + 89 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 39690000 + 40958878689 = 6300^2 + 202383^2 .

It is not a de Polignac number, because 40998568689 - 2⁴ = 40998568673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40998568669) 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 in 29 ways as a sum of consecutive naturals, for example, 1483812 + ... + 1511189.

Almost surely, 2^40998568689 is an apocalyptic number.

It is an amenable number.

40998568689 is a deficient number, since it is larger than the sum of its proper divisors (25319760597).

40998568689 is a wasteful number, since it uses less digits than its factorization.

40998568689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995039 (or 2995017 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 72.

The spelling of 40998568689 in words is "forty billion, nine hundred ninety-eight million, five hundred sixty-eight thousand, six hundred eighty-nine".