16647177157 has 4 divisors (see below), whose sum is σ = 17927729260. Its totient is φ = 15366625056.

The previous prime is 16647177149. The next prime is 16647177163. The reversal of 16647177157 is 75177174661.

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 8288463681 + 8358713476 = 91041^2 + 91426^2 .

It is a cyclic number.

It is not a de Polignac number, because 16647177157 - 2³ = 16647177149 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 (16647177167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640276032 + ... + 640276057.

It is an arithmetic number, because the mean of its divisors is an integer number (4481932315).

Almost surely, 2^16647177157 is an apocalyptic number.

It is an amenable number.

16647177157 is a deficient number, since it is larger than the sum of its proper divisors (1280552103).

16647177157 is a wasteful number, since it uses less digits than its factorization.

16647177157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280552102.

The product of its digits is 1728720, while the sum is 52.

The spelling of 16647177157 in words is "sixteen billion, six hundred forty-seven million, one hundred seventy-seven thousand, one hundred fifty-seven".