165101611651 has 4 divisors (see below), whose sum is σ = 165102438600. Its totient is φ = 165100784704.

The previous prime is 165101611639. The next prime is 165101611663. The reversal of 165101611651 is 156116101561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (165101611639) and next prime (165101611663).

It is a cyclic number.

It is not a de Polignac number, because 165101611651 - 2¹⁵ = 165101578883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165101611601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91920 + ... + 581938.

It is an arithmetic number, because the mean of its divisors is an integer number (41275609650).

Almost surely, 2^165101611651 is an apocalyptic number.

165101611651 is a deficient number, since it is larger than the sum of its proper divisors (826949).

165101611651 is an equidigital number, since it uses as much as digits as its factorization.

165101611651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826948.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 165101611651 in words is "one hundred sixty-five billion, one hundred one million, six hundred eleven thousand, six hundred fifty-one".