128783814813 has 8 divisors (see below), whose sum is σ = 190790836800. Its totient is φ = 85855876524.

The previous prime is 128783814799. The next prime is 128783814827. The reversal of 128783814813 is 318418387821.

128783814813 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 83 + 81 + 481 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (128783814799) and next prime (128783814827).

It is not a de Polignac number, because 128783814813 - 2⁶ = 128783814749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128783814813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128783814833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2384885433 + ... + 2384885486.

It is an arithmetic number, because the mean of its divisors is an integer number (23848854600).

Almost surely, 2^128783814813 is an apocalyptic number.

It is an amenable number.

128783814813 is a deficient number, since it is larger than the sum of its proper divisors (62007021987).

128783814813 is an equidigital number, since it uses as much as digits as its factorization.

128783814813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769770928 (or 4769770922 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 128783814813 in words is "one hundred twenty-eight billion, seven hundred eighty-three million, eight hundred fourteen thousand, eight hundred thirteen".