2172448649 has 16 divisors (see below), whose sum is σ = 2634270336. Its totient is φ = 1748947200.

The previous prime is 2172448631. The next prime is 2172448741. The reversal of 2172448649 is 9468442712.

It is not a de Polignac number, because 2172448649 - 2⁸ = 2172448393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172748649) 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 15 ways as a sum of consecutive naturals, for example, 39839 + ... + 77019.

It is an arithmetic number, because the mean of its divisors is an integer number (164641896).

Almost surely, 2^2172448649 is an apocalyptic number.

It is an amenable number.

2172448649 is a deficient number, since it is larger than the sum of its proper divisors (461821687).

2172448649 is a wasteful number, since it uses less digits than its factorization.

2172448649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37696.

The product of its digits is 774144, while the sum is 47.

The square root of 2172448649 is about 46609.5338852471. The cubic root of 2172448649 is about 1295.1393735000.

The spelling of 2172448649 in words is "two billion, one hundred seventy-two million, four hundred forty-eight thousand, six hundred forty-nine".