40569557 has 4 divisors (see below), whose sum is σ = 46365216. Its totient is φ = 34773900.

The previous prime is 40569553. The next prime is 40569577. The reversal of 40569557 is 75596504.

40569557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40569557 - 2² = 40569553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40569553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897819 + ... + 2897832.

It is an arithmetic number, because the mean of its divisors is an integer number (11591304).

Almost surely, 2^40569557 is an apocalyptic number.

It is an amenable number.

40569557 is a deficient number, since it is larger than the sum of its proper divisors (5795659).

40569557 is an equidigital number, since it uses as much as digits as its factorization.

40569557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795658.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 40569557 is about 6369.4236002954. The cubic root of 40569557 is about 343.6107600476.

The spelling of 40569557 in words is "forty million, five hundred sixty-nine thousand, five hundred fifty-seven".