40518453887 has 4 divisors (see below), whose sum is σ = 40519459056. Its totient is φ = 40517448720.

The previous prime is 40518453847. The next prime is 40518453901. The reversal of 40518453887 is 78835481504.

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 40518453887 - 2⁶ = 40518453823 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 (40518453847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439478 + ... + 523619.

It is an arithmetic number, because the mean of its divisors is an integer number (10129864764).

Almost surely, 2^40518453887 is an apocalyptic number.

40518453887 is a deficient number, since it is larger than the sum of its proper divisors (1005169).

40518453887 is an equidigital number, since it uses as much as digits as its factorization.

40518453887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005168.

The product of its (nonzero) digits is 4300800, while the sum is 53.

The spelling of 40518453887 in words is "forty billion, five hundred eighteen million, four hundred fifty-three thousand, eight hundred eighty-seven".