4625921665 has 4 divisors (see below), whose sum is σ = 5551106004. Its totient is φ = 3700737328.

The previous prime is 4625921647. The next prime is 4625921687. The reversal of 4625921665 is 5661295264.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1327946481 + 3297975184 = 36441^2 + 57428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4625921665 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 462592162 + ... + 462592171.

It is an arithmetic number, because the mean of its divisors is an integer number (1387776501).

Almost surely, 2^4625921665 is an apocalyptic number.

It is an amenable number.

4625921665 is a deficient number, since it is larger than the sum of its proper divisors (925184339).

4625921665 is an equidigital number, since it uses as much as digits as its factorization.

4625921665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925184338.

The product of its digits is 777600, while the sum is 46.

The square root of 4625921665 is about 68014.1284219683. The cubic root of 4625921665 is about 1666.2215920669.

The spelling of 4625921665 in words is "four billion, six hundred twenty-five million, nine hundred twenty-one thousand, six hundred sixty-five".