165500101601 has 8 divisors (see below), whose sum is σ = 165757533480. Its totient is φ = 165242783232.

The previous prime is 165500101549. The next prime is 165500101621. The reversal of 165500101601 is 106101005561.

It can be written as a sum of positive squares in 4 ways, for example, as 33641062225 + 131859039376 = 183415^2 + 363124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165500101601 - 2¹⁸ = 165499839457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165500101621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3165791 + ... + 3217643.

It is an arithmetic number, because the mean of its divisors is an integer number (20719691685).

Almost surely, 2^165500101601 is an apocalyptic number.

It is an amenable number.

165500101601 is a deficient number, since it is larger than the sum of its proper divisors (257431879).

165500101601 is an equidigital number, since it uses as much as digits as its factorization.

165500101601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56755.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 165500101601 in words is "one hundred sixty-five billion, five hundred million, one hundred one thousand, six hundred one".