165143324301601 has 4 divisors (see below), whose sum is σ = 166403960365104. Its totient is φ = 163882688238100.

The previous prime is 165143324301581. The next prime is 165143324301643. The reversal of 165143324301601 is 106103423341561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165143324301601 - 2¹⁷ = 165143324170529 is a prime.

It is a super-2 number, since 2×165143324301601² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165143324301301) 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, 630318031555 + ... + 630318031816.

It is an arithmetic number, because the mean of its divisors is an integer number (41600990091276).

Almost surely, 2^{165143324301601} is an apocalyptic number.

It is an amenable number.

165143324301601 is a deficient number, since it is larger than the sum of its proper divisors (1260636063503).

165143324301601 is a wasteful number, since it uses less digits than its factorization.

165143324301601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260636063502.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 165143324301601 in words is "one hundred sixty-five trillion, one hundred forty-three billion, three hundred twenty-four million, three hundred one thousand, six hundred one".