649766193 has 8 divisors (see below), whose sum is σ = 869980800. Its totient is φ = 431364528.

The previous prime is 649766177. The next prime is 649766219. The reversal of 649766193 is 391667946.

649766193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 649766193 - 2⁴ = 649766177 is a prime.

It is a super-2 number, since 2×649766193² = 844392211131426498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (649766093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452398 + ... + 453831.

It is an arithmetic number, because the mean of its divisors is an integer number (108747600).

Almost surely, 2^649766193 is an apocalyptic number.

It is an amenable number.

649766193 is a deficient number, since it is larger than the sum of its proper divisors (220214607).

649766193 is a wasteful number, since it uses less digits than its factorization.

649766193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906471.

The product of its digits is 1469664, while the sum is 51.

The square root of 649766193 is about 25490.5118230294. The cubic root of 649766193 is about 866.1352299280.

The spelling of 649766193 in words is "six hundred forty-nine million, seven hundred sixty-six thousand, one hundred ninety-three".