649591706177 has 4 divisors (see below), whose sum is σ = 670546277376. Its totient is φ = 628637134980.

The previous prime is 649591706149. The next prime is 649591706189. The reversal of 649591706177 is 771607195946.

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 649591706177 - 2¹⁰ = 649591705153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649591706107) 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, 10477285553 + ... + 10477285614.

It is an arithmetic number, because the mean of its divisors is an integer number (167636569344).

Almost surely, 2^649591706177 is an apocalyptic number.

It is an amenable number.

649591706177 is a deficient number, since it is larger than the sum of its proper divisors (20954571199).

649591706177 is a wasteful number, since it uses less digits than its factorization.

649591706177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20954571198.

The product of its (nonzero) digits is 20003760, while the sum is 62.

The spelling of 649591706177 in words is "six hundred forty-nine billion, five hundred ninety-one million, seven hundred six thousand, one hundred seventy-seven".