16128156677 has 4 divisors (see below), whose sum is σ = 16172102976. Its totient is φ = 16084210380.

The previous prime is 16128156659. The next prime is 16128156697. The reversal of 16128156677 is 77665182161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16128156677 - 2¹⁰ = 16128155653 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 (16128156617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21972599 + ... + 21973332.

It is an arithmetic number, because the mean of its divisors is an integer number (4043025744).

Almost surely, 2^16128156677 is an apocalyptic number.

It is an amenable number.

16128156677 is a deficient number, since it is larger than the sum of its proper divisors (43946299).

16128156677 is an equidigital number, since it uses as much as digits as its factorization.

16128156677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43946298.

The product of its digits is 846720, while the sum is 50.

The spelling of 16128156677 in words is "sixteen billion, one hundred twenty-eight million, one hundred fifty-six thousand, six hundred seventy-seven".