128711711818503 has 48 divisors (see below), whose sum is σ = 204115473053856. Its totient is φ = 77508796081920.

The previous prime is 128711711818433. The next prime is 128711711818519. The reversal of 128711711818503 is 305818117117821.

128711711818503 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 1 + 1 + 7 + 118 + 18 + 503 = 666.

It is not a de Polignac number, because 128711711818503 - 2²¹ = 128711709721351 is a prime.

It is a super-2 number, since 2×128711711818503² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128711711818503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128711711818523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25741501 + ... + 30332297.

It is an arithmetic number, because the mean of its divisors is an integer number (4252405688622).

Almost surely, 2^{128711711818503} is an apocalyptic number.

128711711818503 is a deficient number, since it is larger than the sum of its proper divisors (75403761235353).

128711711818503 is a wasteful number, since it uses less digits than its factorization.

128711711818503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592624 (or 4592621 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 54.

The spelling of 128711711818503 in words is "one hundred twenty-eight trillion, seven hundred eleven billion, seven hundred eleven million, eight hundred eighteen thousand, five hundred three".