2170907649 has 45 divisors (see below), whose sum is σ = 3371132721. Its totient is φ = 1392198840.

The previous prime is 2170907639. The next prime is 2170907657. The reversal of 2170907649 is 9467090712.

The square root of 2170907649 is 46593.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2170907649 - 2¹⁷ = 2170776577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2170907639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12999364 + ... + 12999530.

Almost surely, 2^2170907649 is an apocalyptic number.

2170907649 is the 46593-rd square number.

2170907649 is the 23297-th centered octagonal number.

It is an amenable number.

2170907649 is a deficient number, since it is larger than the sum of its proper divisors (1200225072).

2170907649 is an frugal number, since it uses more digits than its factorization.

2170907649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The cubic root of 2170907649 is about 1294.8330706156.

The spelling of 2170907649 in words is "two billion, one hundred seventy million, nine hundred seven thousand, six hundred forty-nine".