128677506428 has 24 divisors (see below), whose sum is σ = 244875958992. Its totient is φ = 58917521664.

The previous prime is 128677506427. The next prime is 128677506457. The reversal of 128677506428 is 824605776821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128677506421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25569326 + ... + 25574357.

It is an arithmetic number, because the mean of its divisors is an integer number (10203164958).

Almost surely, 2^128677506428 is an apocalyptic number.

It is an amenable number.

128677506428 is a deficient number, since it is larger than the sum of its proper divisors (116198452564).

128677506428 is a wasteful number, since it uses less digits than its factorization.

128677506428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51143741 (or 51143739 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 128677506428 in words is "one hundred twenty-eight billion, six hundred seventy-seven million, five hundred six thousand, four hundred twenty-eight".