649956773969 has 4 divisors (see below), whose sum is σ = 652546243440. Its totient is φ = 647367304500.

The previous prime is 649956773927. The next prime is 649956774001. The reversal of 649956773969 is 969377659946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 649956773969 - 2²⁴ = 649939996753 is a prime.

It is a super-2 number, since 2×649956773969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649956773893 and 649956773902.

It is not an unprimeable number, because it can be changed into a prime (649956773369) 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 3 ways as a sum of consecutive naturals, for example, 1294734359 + ... + 1294734860.

It is an arithmetic number, because the mean of its divisors is an integer number (163136560860).

Almost surely, 2^649956773969 is an apocalyptic number.

It is an amenable number.

649956773969 is a deficient number, since it is larger than the sum of its proper divisors (2589469471).

649956773969 is a wasteful number, since it uses less digits than its factorization.

649956773969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589469470.

The product of its digits is 4166497440, while the sum is 80.

The spelling of 649956773969 in words is "six hundred forty-nine billion, nine hundred fifty-six million, seven hundred seventy-three thousand, nine hundred sixty-nine".