40664564550 has 36 divisors (see below), whose sum is σ = 109252131300. Its totient is φ = 10843883760.

The previous prime is 40664564509. The next prime is 40664564623. The reversal of 40664564550 is 5546546604.

40664564550 is a `hidden beast` number, since 40 + 6 + 6 + 4 + 56 + 4 + 550 = 666.

It is a super-2 number, since 2×40664564550² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 40664564496 and 40664564505.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 45182400 + ... + 45183299.

It is an arithmetic number, because the mean of its divisors is an integer number (3034781425).

Almost surely, 2^40664564550 is an apocalyptic number.

40664564550 is an abundant number, since it is smaller than the sum of its proper divisors (68587566750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40664564550 is a wasteful number, since it uses less digits than its factorization.

40664564550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90365717 (or 90365709 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 40664564550 in words is "forty billion, six hundred sixty-four million, five hundred sixty-four thousand, five hundred fifty".