128766886317 has 24 divisors (see below), whose sum is σ = 195811293600. Its totient is φ = 81315910368.

The previous prime is 128766886289. The next prime is 128766886351. The reversal of 128766886317 is 713688667821.

It is not a de Polignac number, because 128766886317 - 2¹² = 128766882221 is a prime.

It is a super-4 number, since 4×128766886317⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128766886217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1399159 + ... + 1488347.

It is an arithmetic number, because the mean of its divisors is an integer number (8158803900).

Almost surely, 2^128766886317 is an apocalyptic number.

It is an amenable number.

128766886317 is a deficient number, since it is larger than the sum of its proper divisors (67044407283).

128766886317 is a wasteful number, since it uses less digits than its factorization.

128766886317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97657 (or 97654 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 128766886317 in words is "one hundred twenty-eight billion, seven hundred sixty-six million, eight hundred eighty-six thousand, three hundred seventeen".