649729566433 has 8 divisors (see below), whose sum is σ = 655721375400. Its totient is φ = 643759507200.

The previous prime is 649729566413. The next prime is 649729566457. The reversal of 649729566433 is 334665927946.

It can be written as a sum of positive squares in 4 ways, for example, as 54504972369 + 595224594064 = 233463^2 + 771508^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 649729566433 - 2¹⁷ = 649729435361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649729566413) 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, 5377410 + ... + 5496907.

It is an arithmetic number, because the mean of its divisors is an integer number (81965171925).

Almost surely, 2^649729566433 is an apocalyptic number.

It is an amenable number.

649729566433 is a deficient number, since it is larger than the sum of its proper divisors (5991808967).

649729566433 is a wasteful number, since it uses less digits than its factorization.

649729566433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10874867.

The product of its digits is 176359680, while the sum is 64.

The spelling of 649729566433 in words is "six hundred forty-nine billion, seven hundred twenty-nine million, five hundred sixty-six thousand, four hundred thirty-three".