6418536121 has 4 divisors (see below), whose sum is σ = 6423035472. Its totient is φ = 6414036772.

The previous prime is 6418536119. The next prime is 6418536181. The reversal of 6418536121 is 1216358146.

It is a happy number.

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 6418536121 - 2¹ = 6418536119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6418536181) 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, 2247535 + ... + 2250388.

It is an arithmetic number, because the mean of its divisors is an integer number (1605758868).

Almost surely, 2^6418536121 is an apocalyptic number.

It is an amenable number.

6418536121 is a deficient number, since it is larger than the sum of its proper divisors (4499351).

6418536121 is a wasteful number, since it uses less digits than its factorization.

6418536121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499350.

The product of its digits is 34560, while the sum is 37.

The square root of 6418536121 is about 80115.7669937697. The cubic root of 6418536121 is about 1858.4262443513.

The spelling of 6418536121 in words is "six billion, four hundred eighteen million, five hundred thirty-six thousand, one hundred twenty-one".