40505555 has 8 divisors (see below), whose sum is σ = 48714432. Its totient is φ = 32332608.

The previous prime is 40505539. The next prime is 40505567. The reversal of 40505555 is 55550504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40505555 - 2⁴ = 40505539 is a prime.

It is a Duffinian number.

40505555 is a modest number, since divided by 5555 gives 4050 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (6089304).

Almost surely, 2^40505555 is an apocalyptic number.

40505555 is a deficient number, since it is larger than the sum of its proper divisors (8208877).

40505555 is a wasteful number, since it uses less digits than its factorization.

40505555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17965.

The product of its (nonzero) digits is 12500, while the sum is 29.

The square root of 40505555 is about 6364.3974577331. The cubic root of 40505555 is about 343.4299730053.

The spelling of 40505555 in words is "forty million, five hundred five thousand, five hundred fifty-five".