16177277161 has 4 divisors (see below), whose sum is σ = 16337448324. Its totient is φ = 16017106000.

The previous prime is 16177277131. The next prime is 16177277167.

16177277161 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11487766761 + 4689510400 = 107181^2 + 68480^2 .

It is a cyclic number.

It is not a de Polignac number, because 16177277161 - 2⁹ = 16177276649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16177277167) 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, 80085430 + ... + 80085631.

It is an arithmetic number, because the mean of its divisors is an integer number (4084362081).

Almost surely, 2^16177277161 is an apocalyptic number.

It is an amenable number.

16177277161 is a deficient number, since it is larger than the sum of its proper divisors (160171163).

16177277161 is a wasteful number, since it uses less digits than its factorization.

16177277161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160171162.

The product of its digits is 172872, while the sum is 46.

The spelling of 16177277161 in words is "sixteen billion, one hundred seventy-seven million, two hundred seventy-seven thousand, one hundred sixty-one".