649822549437 has 8 divisors (see below), whose sum is σ = 962700073280. Its totient is φ = 433215032940.

The previous prime is 649822549427. The next prime is 649822549589. The reversal of 649822549437 is 734945228946.

649822549437 is a `hidden beast` number, since 6 + 4 + 9 + 82 + 2 + 549 + 4 + 3 + 7 = 666.

It is not a de Polignac number, because 649822549437 - 2⁷ = 649822549309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649822549427) 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, 12033750889 + ... + 12033750942.

It is an arithmetic number, because the mean of its divisors is an integer number (120337509160).

Almost surely, 2^649822549437 is an apocalyptic number.

It is an amenable number.

649822549437 is a deficient number, since it is larger than the sum of its proper divisors (312877523843).

649822549437 is a wasteful number, since it uses less digits than its factorization.

649822549437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24067501840 (or 24067501834 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 63.

The spelling of 649822549437 in words is "six hundred forty-nine billion, eight hundred twenty-two million, five hundred forty-nine thousand, four hundred thirty-seven".