649612269 has 6 divisors (see below), whose sum is σ = 938328846. Its totient is φ = 433074840.

The previous prime is 649612237. The next prime is 649612283. The reversal of 649612269 is 962216946.

649612269 is a `hidden beast` number, since 6 + 4 + 9 + 612 + 26 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 447830244 + 201782025 = 21162^2 + 14205^2 .

It is not a de Polignac number, because 649612269 - 2⁵ = 649612237 is a prime.

It is a super-4 number, since 4×649612269⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649612289) 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 5 ways as a sum of consecutive naturals, for example, 36089562 + ... + 36089579.

It is an arithmetic number, because the mean of its divisors is an integer number (156388141).

Almost surely, 2^649612269 is an apocalyptic number.

It is an amenable number.

649612269 is a deficient number, since it is larger than the sum of its proper divisors (288716577).

649612269 is a wasteful number, since it uses less digits than its factorization.

649612269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72179147 (or 72179144 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 649612269 is about 25487.4924031377. The cubic root of 649612269 is about 866.0668312079.

The spelling of 649612269 in words is "six hundred forty-nine million, six hundred twelve thousand, two hundred sixty-nine".