40556500641 has 12 divisors (see below), whose sum is σ = 58583402020. Its totient is φ = 27036840960.

The previous prime is 40556500631. The next prime is 40556500679. The reversal of 40556500641 is 14600565504.

40556500641 is a `hidden beast` number, since 4 + 0 + 5 + 5 + 6 + 5 + 0 + 0 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2259576225 + 38296924416 = 47535^2 + 195696^2 .

It is not a de Polignac number, because 40556500641 - 2⁶ = 40556500577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40556500596 and 40556500605.

It is not an unprimeable number, because it can be changed into a prime (40556500631) 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 11 ways as a sum of consecutive naturals, for example, 440061 + ... + 524181.

Almost surely, 2^40556500641 is an apocalyptic number.

It is an amenable number.

40556500641 is a deficient number, since it is larger than the sum of its proper divisors (18026901379).

40556500641 is a wasteful number, since it uses less digits than its factorization.

40556500641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137696 (or 137693 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 40556500641 in words is "forty billion, five hundred fifty-six million, five hundred thousand, six hundred forty-one".