128671684676 has 72 divisors (see below), whose sum is σ = 249381981576. Its totient is φ = 57881958400.

The previous prime is 128671684667. The next prime is 128671684699. The reversal of 128671684676 is 676486176821.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 8244640000 + 120427044676 = 90800^2 + 347026^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5764850 + ... + 5787126.

It is an arithmetic number, because the mean of its divisors is an integer number (3463638633).

Almost surely, 2^128671684676 is an apocalyptic number.

It is an amenable number.

128671684676 is a deficient number, since it is larger than the sum of its proper divisors (120710296900).

128671684676 is a wasteful number, since it uses less digits than its factorization.

128671684676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22457 (or 22426 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 62.

The spelling of 128671684676 in words is "one hundred twenty-eight billion, six hundred seventy-one million, six hundred eighty-four thousand, six hundred seventy-six".