161160065156077 has 4 divisors (see below), whose sum is σ = 173556993245020. Its totient is φ = 148763137067136.

The previous prime is 161160065156039. The next prime is 161160065156089. The reversal of 161160065156077 is 770651560061161.

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 95407006057801 + 65753059098276 = 9767651^2 + 8108826^2 .

It is a cyclic number.

It is not a de Polignac number, because 161160065156077 - 2³¹ = 161157917672429 is a prime.

It is a super-2 number, since 2×161160065156077² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161160065186077) 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, 6198464044452 + ... + 6198464044477.

It is an arithmetic number, because the mean of its divisors is an integer number (43389248311255).

Almost surely, 2^{161160065156077} is an apocalyptic number.

It is an amenable number.

161160065156077 is a deficient number, since it is larger than the sum of its proper divisors (12396928088943).

161160065156077 is a wasteful number, since it uses less digits than its factorization.

161160065156077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12396928088942.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 161160065156077 in words is "one hundred sixty-one trillion, one hundred sixty billion, sixty-five million, one hundred fifty-six thousand, seventy-seven".