2649405969 has 32 divisors (see below), whose sum is σ = 4491264000. Its totient is φ = 1512091152.

The previous prime is 2649405893. The next prime is 2649405973. The reversal of 2649405969 is 9695049462.

It is a happy number.

2649405969 is a `hidden beast` number, since 2 + 6 + 4 + 9 + 40 + 596 + 9 = 666.

It is not a de Polignac number, because 2649405969 - 2⁸ = 2649405713 is a prime.

It is a super-2 number, since 2×2649405969² = 14038703977145657922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2649405989) 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 31 ways as a sum of consecutive naturals, for example, 154192 + ... + 170510.

It is an arithmetic number, because the mean of its divisors is an integer number (140352000).

Almost surely, 2^2649405969 is an apocalyptic number.

It is an amenable number.

2649405969 is a deficient number, since it is larger than the sum of its proper divisors (1841858031).

2649405969 is a wasteful number, since it uses less digits than its factorization.

2649405969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17194 (or 17188 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The square root of 2649405969 is about 51472.3806424377. The cubic root of 2649405969 is about 1383.7240951078.

The spelling of 2649405969 in words is "two billion, six hundred forty-nine million, four hundred five thousand, nine hundred sixty-nine".