128264936816 has 20 divisors (see below), whose sum is σ = 248544825000. Its totient is φ = 64124336832.

The previous prime is 128264936797. The next prime is 128264936851. The reversal of 128264936816 is 618639462821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377066 + ... + 631433.

It is an arithmetic number, because the mean of its divisors is an integer number (12427241250).

Almost surely, 2^128264936816 is an apocalyptic number.

128264936816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128264936816 is a deficient number, since it is larger than the sum of its proper divisors (120279888184).

128264936816 is a wasteful number, since it uses less digits than its factorization.

128264936816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016456 (or 1016450 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The spelling of 128264936816 in words is "one hundred twenty-eight billion, two hundred sixty-four million, nine hundred thirty-six thousand, eight hundred sixteen".