2649165945 has 8 divisors (see below), whose sum is σ = 4238665536. Its totient is φ = 1412888496.

The previous prime is 2649165943. The next prime is 2649165949. The reversal of 2649165945 is 5495619462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2649165945 - 2¹ = 2649165943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2649165941) 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 7 ways as a sum of consecutive naturals, for example, 88305517 + ... + 88305546.

It is an arithmetic number, because the mean of its divisors is an integer number (529833192).

Almost surely, 2^2649165945 is an apocalyptic number.

It is an amenable number.

2649165945 is a deficient number, since it is larger than the sum of its proper divisors (1589499591).

2649165945 is a wasteful number, since it uses less digits than its factorization.

2649165945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176611071.

The product of its digits is 2332800, while the sum is 51.

The square root of 2649165945 is about 51470.0490091082. The cubic root of 2649165945 is about 1383.6823074987.

The spelling of 2649165945 in words is "two billion, six hundred forty-nine million, one hundred sixty-five thousand, nine hundred forty-five".