165842743737 has 16 divisors (see below), whose sum is σ = 249007288320. Its totient is φ = 97268470800.

The previous prime is 165842743691. The next prime is 165842743747. The reversal of 165842743737 is 737347248561.

It is not a de Polignac number, because 165842743737 - 2⁷ = 165842743609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165842743747) 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, 81056037 + ... + 81058082.

It is an arithmetic number, because the mean of its divisors is an integer number (15562955520).

Almost surely, 2^165842743737 is an apocalyptic number.

It is an amenable number.

165842743737 is a deficient number, since it is larger than the sum of its proper divisors (83164544583).

165842743737 is a wasteful number, since it uses less digits than its factorization.

165842743737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162114164.

The product of its digits is 23708160, while the sum is 57.

The spelling of 165842743737 in words is "one hundred sixty-five billion, eight hundred forty-two million, seven hundred forty-three thousand, seven hundred thirty-seven".