128477277683 has 4 divisors (see below), whose sum is σ = 128492363928. Its totient is φ = 128462191440.

The previous prime is 128477277679. The next prime is 128477277697. The reversal of 128477277683 is 386772774821.

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

It is a cyclic number.

It is not a de Polignac number, because 128477277683 - 2² = 128477277679 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128477277583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7530341 + ... + 7547382.

It is an arithmetic number, because the mean of its divisors is an integer number (32123090982).

Almost surely, 2^128477277683 is an apocalyptic number.

128477277683 is a deficient number, since it is larger than the sum of its proper divisors (15086245).

128477277683 is an equidigital number, since it uses as much as digits as its factorization.

128477277683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15086244.

The product of its digits is 44255232, while the sum is 62.

The spelling of 128477277683 in words is "one hundred twenty-eight billion, four hundred seventy-seven million, two hundred seventy-seven thousand, six hundred eighty-three".