6418136878 has 4 divisors (see below), whose sum is σ = 9627205320. Its totient is φ = 3209068438.

The previous prime is 6418136869. The next prime is 6418136887. The reversal of 6418136878 is 8786318146.

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

It is an interprime number because it is at equal distance from previous prime (6418136869) and next prime (6418136887).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604534218 + ... + 1604534221.

It is an arithmetic number, because the mean of its divisors is an integer number (2406801330).

Almost surely, 2^6418136878 is an apocalyptic number.

6418136878 is a deficient number, since it is larger than the sum of its proper divisors (3209068442).

6418136878 is a wasteful number, since it uses less digits than its factorization.

6418136878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209068441.

The product of its digits is 1548288, while the sum is 52.

The square root of 6418136878 is about 80113.2752919265. The cubic root of 6418136878 is about 1858.3877112113.

The spelling of 6418136878 in words is "six billion, four hundred eighteen million, one hundred thirty-six thousand, eight hundred seventy-eight".