6418557841 has 4 divisors (see below), whose sum is σ = 6567826672. Its totient is φ = 6269289012.

The previous prime is 6418557829. The next prime is 6418557851. The reversal of 6418557841 is 1487558146.

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 a cyclic number.

It is not a de Polignac number, because 6418557841 - 2¹³ = 6418549649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6418557851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74634351 + ... + 74634436.

It is an arithmetic number, because the mean of its divisors is an integer number (1641956668).

Almost surely, 2^6418557841 is an apocalyptic number.

It is an amenable number.

6418557841 is a deficient number, since it is larger than the sum of its proper divisors (149268831).

6418557841 is a wasteful number, since it uses less digits than its factorization.

6418557841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149268830.

The product of its digits is 1075200, while the sum is 49.

The square root of 6418557841 is about 80115.9025474968. The cubic root of 6418557841 is about 1858.4283406223.

The spelling of 6418557841 in words is "six billion, four hundred eighteen million, five hundred fifty-seven thousand, eight hundred forty-one".