128242582477 has 32 divisors (see below), whose sum is σ = 134291520000. Its totient is φ = 122376629760.

The previous prime is 128242582459. The next prime is 128242582483. The reversal of 128242582477 is 774285242821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128242582477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128242582277) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 136282827 + ... + 136283767.

It is an arithmetic number, because the mean of its divisors is an integer number (4196610000).

Almost surely, 2^128242582477 is an apocalyptic number.

It is an amenable number.

128242582477 is a deficient number, since it is larger than the sum of its proper divisors (6048937523).

128242582477 is a wasteful number, since it uses less digits than its factorization.

128242582477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461.

The product of its digits is 4014080, while the sum is 52.

The spelling of 128242582477 in words is "one hundred twenty-eight billion, two hundred forty-two million, five hundred eighty-two thousand, four hundred seventy-seven".