649407316191 has 8 divisors (see below), whose sum is σ = 865932487344. Its totient is φ = 432910177920.

The previous prime is 649407316147. The next prime is 649407316223. The reversal of 649407316191 is 191613704946.

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

It is not a de Polignac number, because 649407316191 - 2¹⁵ = 649407283423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649407316121) 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, 6954106 + ... + 7046871.

It is an arithmetic number, because the mean of its divisors is an integer number (108241560918).

Almost surely, 2^649407316191 is an apocalyptic number.

649407316191 is a deficient number, since it is larger than the sum of its proper divisors (216525171153).

649407316191 is a wasteful number, since it uses less digits than its factorization.

649407316191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14016441.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 649407316191 in words is "six hundred forty-nine billion, four hundred seven million, three hundred sixteen thousand, one hundred ninety-one".