128502862756678 has 4 divisors (see below), whose sum is σ = 192754294135020. Its totient is φ = 64251431378338.

The previous prime is 128502862756627. The next prime is 128502862756727. The reversal of 128502862756678 is 876657268205821.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×128502862756678³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128502862756678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32125715689168 + ... + 32125715689171.

It is an arithmetic number, because the mean of its divisors is an integer number (48188573533755).

Almost surely, 2^{128502862756678} is an apocalyptic number.

128502862756678 is a deficient number, since it is larger than the sum of its proper divisors (64251431378342).

128502862756678 is an equidigital number, since it uses as much as digits as its factorization.

128502862756678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64251431378341.

The product of its (nonzero) digits is 1083801600, while the sum is 73.

The spelling of 128502862756678 in words is "one hundred twenty-eight trillion, five hundred two billion, eight hundred sixty-two million, seven hundred fifty-six thousand, six hundred seventy-eight".