649830123290 has 32 divisors (see below), whose sum is σ = 1238548150224. Its totient is φ = 244632371200.

The previous prime is 649830123289. The next prime is 649830123343. The reversal of 649830123290 is 92321038946.

649830123290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 469360639801 + 180469483489 = 685099^2 + 424817^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5517902 + ... + 5634438.

Almost surely, 2^649830123290 is an apocalyptic number.

649830123290 is a deficient number, since it is larger than the sum of its proper divisors (588718026934).

649830123290 is a wasteful number, since it uses less digits than its factorization.

649830123290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149362.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 649830123290 in words is "six hundred forty-nine billion, eight hundred thirty million, one hundred twenty-three thousand, two hundred ninety".