165293149771 has 4 divisors (see below), whose sum is σ = 166387806544. Its totient is φ = 164198493000.

The previous prime is 165293149711. The next prime is 165293149783. The reversal of 165293149771 is 177941392561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177941392561 = 421831².

It is a cyclic number.

It is not a de Polignac number, because 165293149771 - 2¹³ = 165293141579 is a prime.

It is a super-2 number, since 2×165293149771² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165293149711) 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, 547328160 + ... + 547328461.

It is an arithmetic number, because the mean of its divisors is an integer number (41596951636).

Almost surely, 2^165293149771 is an apocalyptic number.

165293149771 is a deficient number, since it is larger than the sum of its proper divisors (1094656773).

165293149771 is a wasteful number, since it uses less digits than its factorization.

165293149771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094656772.

The product of its digits is 2857680, while the sum is 55.

The spelling of 165293149771 in words is "one hundred sixty-five billion, two hundred ninety-three million, one hundred forty-nine thousand, seven hundred seventy-one".