128591977448 has 32 divisors (see below), whose sum is σ = 263685049920. Its totient is φ = 58305120000.

The previous prime is 128591977421. The next prime is 128591977457. The reversal of 128591977448 is 844779195821.

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 7 ways as a sum of consecutive naturals, for example, 1786748 + ... + 1857323.

It is an arithmetic number, because the mean of its divisors is an integer number (8240157810).

Almost surely, 2^128591977448 is an apocalyptic number.

It is an amenable number.

128591977448 is an abundant number, since it is smaller than the sum of its proper divisors (135093072472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128591977448 is a wasteful number, since it uses less digits than its factorization.

128591977448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644489 (or 3644485 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 65.

The spelling of 128591977448 in words is "one hundred twenty-eight billion, five hundred ninety-one million, nine hundred seventy-seven thousand, four hundred forty-eight".