2578201065 has 48 divisors (see below), whose sum is σ = 5043280320. Its totient is φ = 1206925440.

The previous prime is 2578201049. The next prime is 2578201097. The reversal of 2578201065 is 5601028752.

It is a happy number.

2578201065 is a `hidden beast` number, since 2 + 578 + 20 + 1 + 0 + 65 = 666.

It is not a de Polignac number, because 2578201065 - 2⁴ = 2578201049 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 75447 + ... + 104156.

It is an arithmetic number, because the mean of its divisors is an integer number (105068340).

Almost surely, 2^2578201065 is an apocalyptic number.

It is an amenable number.

2578201065 is a deficient number, since it is larger than the sum of its proper divisors (2465079255).

2578201065 is a wasteful number, since it uses less digits than its factorization.

2578201065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179654 (or 179651 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2578201065 is about 50775.9890597908. The cubic root of 2578201065 is about 1371.2151232866.

The spelling of 2578201065 in words is "two billion, five hundred seventy-eight million, two hundred one thousand, sixty-five".