649343808343946 has 8 divisors (see below), whose sum is σ = 974016291894564. Its totient is φ = 324671711045760.

The previous prime is 649343808343943. The next prime is 649343808343957.

649343808343946 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 478239383629225 + 171104424714721 = 21868685^2 + 13080689^2 .

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

It is not an unprimeable number, because it can be changed into a prime (649343808343943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92323025 + ... + 99107156.

Almost surely, 2^{649343808343946} is an apocalyptic number.

649343808343946 is a deficient number, since it is larger than the sum of its proper divisors (324672483550618).

649343808343946 is a wasteful number, since it uses less digits than its factorization.

649343808343946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193126216.

The product of its (nonzero) digits is 3869835264, while the sum is 74.

The spelling of 649343808343946 in words is "six hundred forty-nine trillion, three hundred forty-three billion, eight hundred eight million, three hundred forty-three thousand, nine hundred forty-six".