128899668676 has 27 divisors (see below), whose sum is σ = 228250605639. Its totient is φ = 63694084608.

The previous prime is 128899668671. The next prime is 128899668679. The reversal of 128899668676 is 676866998821.

The square root of 128899668676 is 359026.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 322920900 + 128576747776 = 17970^2 + 358576^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128899668671) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63905620 + ... + 63907636.

Almost surely, 2^128899668676 is an apocalyptic number.

128899668676 is the 359026-th square number.

It is an amenable number.

128899668676 is a deficient number, since it is larger than the sum of its proper divisors (99350936963).

128899668676 is an frugal number, since it uses more digits than its factorization.

128899668676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216 (or 2108 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 76.

The spelling of 128899668676 in words is "one hundred twenty-eight billion, eight hundred ninety-nine million, six hundred sixty-eight thousand, six hundred seventy-six".