40605551 has 8 divisors (see below), whose sum is σ = 47099520. Its totient is φ = 34284888.

The previous prime is 40605541. The next prime is 40605559. The reversal of 40605551 is 15550604.

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 40605551 - 2¹⁰ = 40604527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40605551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40605559) 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 7 ways as a sum of consecutive naturals, for example, 42821 + ... + 43758.

It is an arithmetic number, because the mean of its divisors is an integer number (5887440).

Almost surely, 2^40605551 is an apocalyptic number.

40605551 is a deficient number, since it is larger than the sum of its proper divisors (6493969).

40605551 is an equidigital number, since it uses as much as digits as its factorization.

40605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86653.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 40605551 is about 6372.2485042566. The cubic root of 40605551 is about 343.7123491104.

The spelling of 40605551 in words is "forty million, six hundred five thousand, five hundred fifty-one".