40489815571 has 4 divisors (see below), whose sum is σ = 40499555200. Its totient is φ = 40480075944.

The previous prime is 40489815547. The next prime is 40489815581. The reversal of 40489815571 is 17551898404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40489815571 - 2²³ = 40481426963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40489815581) 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 3 ways as a sum of consecutive naturals, for example, 4863576 + ... + 4871893.

It is an arithmetic number, because the mean of its divisors is an integer number (10124888800).

Almost surely, 2^40489815571 is an apocalyptic number.

40489815571 is a deficient number, since it is larger than the sum of its proper divisors (9739629).

40489815571 is an equidigital number, since it uses as much as digits as its factorization.

40489815571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9739628.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 40489815571 in words is "forty billion, four hundred eighty-nine million, eight hundred fifteen thousand, five hundred seventy-one".