128418639418 has 8 divisors (see below), whose sum is σ = 192679765920. Its totient is φ = 64192050780.

The previous prime is 128418639397. The next prime is 128418639439. The reversal of 128418639418 is 814936814821.

It is an interprime number because it is at equal distance from previous prime (128418639397) and next prime (128418639439).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8625168 + ... + 8640043.

It is an arithmetic number, because the mean of its divisors is an integer number (24084970740).

Almost surely, 2^128418639418 is an apocalyptic number.

128418639418 is a deficient number, since it is larger than the sum of its proper divisors (64261126502).

128418639418 is a wasteful number, since it uses less digits than its factorization.

128418639418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17268932.

The product of its digits is 2654208, while the sum is 55.

The spelling of 128418639418 in words is "one hundred twenty-eight billion, four hundred eighteen million, six hundred thirty-nine thousand, four hundred eighteen".