2640171601 has 4 divisors (see below), whose sum is σ = 2641997632. Its totient is φ = 2638345572.

The previous prime is 2640171529. The next prime is 2640171641. The reversal of 2640171601 is 1061710462.

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 2640171601 - 2¹⁵ = 2640138833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2640171601.

It is not an unprimeable number, because it can be changed into a prime (2640171641) 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, 910845 + ... + 913738.

It is an arithmetic number, because the mean of its divisors is an integer number (660499408).

Almost surely, 2^2640171601 is an apocalyptic number.

It is an amenable number.

2640171601 is a deficient number, since it is larger than the sum of its proper divisors (1826031).

2640171601 is a wasteful number, since it uses less digits than its factorization.

2640171601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826030.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2640171601 is about 51382.6001774920. The cubic root of 2640171601 is about 1382.1145906953.

The spelling of 2640171601 in words is "two billion, six hundred forty million, one hundred seventy-one thousand, six hundred one".