128181814363 has 4 divisors (see below), whose sum is σ = 128436649488. Its totient is φ = 127926979240.

The previous prime is 128181814273. The next prime is 128181814381. The reversal of 128181814363 is 363418181821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 363418181821 = 12451 ⋅29187871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128181814363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128181814463) 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, 127416808 + ... + 127417813.

It is an arithmetic number, because the mean of its divisors is an integer number (32109162372).

Almost surely, 2^128181814363 is an apocalyptic number.

128181814363 is a deficient number, since it is larger than the sum of its proper divisors (254835125).

128181814363 is an equidigital number, since it uses as much as digits as its factorization.

128181814363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254835124.

The product of its digits is 221184, while the sum is 46.

The spelling of 128181814363 in words is "one hundred twenty-eight billion, one hundred eighty-one million, eight hundred fourteen thousand, three hundred sixty-three".