128162820077 has 16 divisors (see below), whose sum is σ = 135393793920. Its totient is φ = 120981196800.

The previous prime is 128162820073. The next prime is 128162820083. The reversal of 128162820077 is 770028261821.

It is a cyclic number.

It is not a de Polignac number, because 128162820077 - 2² = 128162820073 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 (128162820073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6115577 + ... + 6136497.

It is an arithmetic number, because the mean of its divisors is an integer number (8462112120).

Almost surely, 2^128162820077 is an apocalyptic number.

It is an amenable number.

128162820077 is a deficient number, since it is larger than the sum of its proper divisors (7230973843).

128162820077 is a wasteful number, since it uses less digits than its factorization.

128162820077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22084.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 128162820077 in words is "one hundred twenty-eight billion, one hundred sixty-two million, eight hundred twenty thousand, seventy-seven".