2128170032165 has 8 divisors (see below), whose sum is σ = 2553868797048. Its totient is φ = 1702492853440.

The previous prime is 2128170032129. The next prime is 2128170032201. The reversal of 2128170032165 is 5612300718212.

It is an interprime number because it is at equal distance from previous prime (2128170032129) and next prime (2128170032201).

It can be written as a sum of positive squares in 4 ways, for example, as 438393624769 + 1689776407396 = 662113^2 + 1299914^2 .

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

It is not a de Polignac number, because 2128170032165 - 2⁶ = 2128170032101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5178842 + ... + 5574651.

It is an arithmetic number, because the mean of its divisors is an integer number (319233599631).

Almost surely, 2^{2128170032165} is an apocalyptic number.

It is an amenable number.

2128170032165 is a deficient number, since it is larger than the sum of its proper divisors (425698764883).

2128170032165 is a wasteful number, since it uses less digits than its factorization.

2128170032165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10793079.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 2128170032165 in words is "two trillion, one hundred twenty-eight billion, one hundred seventy million, thirty-two thousand, one hundred sixty-five".