40557555 has 12 divisors (see below), whose sum is σ = 70299840. Its totient is φ = 21630672.

The previous prime is 40557553. The next prime is 40557581. The reversal of 40557555 is 55575504.

It is a happy number.

It is not a de Polignac number, because 40557555 - 2¹ = 40557553 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40557551) 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, 450595 + ... + 450684.

It is an arithmetic number, because the mean of its divisors is an integer number (5858320).

Almost surely, 2^40557555 is an apocalyptic number.

40557555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40557555 is a deficient number, since it is larger than the sum of its proper divisors (29742285).

40557555 is a wasteful number, since it uses less digits than its factorization.

40557555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901290 (or 901287 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The square root of 40557555 is about 6368.4813731376. The cubic root of 40557555 is about 343.5768723792.

The spelling of 40557555 in words is "forty million, five hundred fifty-seven thousand, five hundred fifty-five".