163161617077 has 16 divisors (see below), whose sum is σ = 173270137392. Its totient is φ = 153110200320.

The previous prime is 163161617071. The next prime is 163161617093. The reversal of 163161617077 is 770716161361.

It can be written as a sum of positive squares in 8 ways, for example, as 1568872881 + 161592744196 = 39609^2 + 401986^2 .

It is a cyclic number.

It is not a de Polignac number, because 163161617077 - 2¹⁹ = 163161092789 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 (163161617071) 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, 22679793 + ... + 22686985.

It is an arithmetic number, because the mean of its divisors is an integer number (10829383587).

Almost surely, 2^163161617077 is an apocalyptic number.

163161617077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

163161617077 is a deficient number, since it is larger than the sum of its proper divisors (10108520315).

163161617077 is a wasteful number, since it uses less digits than its factorization.

163161617077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968.

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 163161617077 in words is "one hundred sixty-three billion, one hundred sixty-one million, six hundred seventeen thousand, seventy-seven".