165201717157 has 32 divisors (see below), whose sum is σ = 173316363264. Its totient is φ = 157338720000.

The previous prime is 165201717151. The next prime is 165201717229. The reversal of 165201717157 is 751717102561.

It is a de Polignac number, because none of the positive numbers 2^k-165201717157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165201717151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174446958 + ... + 174447904.

It is an arithmetic number, because the mean of its divisors is an integer number (5416136352).

Almost surely, 2^165201717157 is an apocalyptic number.

It is an amenable number.

165201717157 is a deficient number, since it is larger than the sum of its proper divisors (8114646107).

165201717157 is a wasteful number, since it uses less digits than its factorization.

165201717157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its (nonzero) digits is 102900, while the sum is 43.

The spelling of 165201717157 in words is "one hundred sixty-five billion, two hundred one million, seven hundred seventeen thousand, one hundred fifty-seven".