649868455477 has 8 divisors (see below), whose sum is σ = 650697372000. Its totient is φ = 649039915824.

The previous prime is 649868455471. The next prime is 649868455493. The reversal of 649868455477 is 774554868946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649868455477 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 (649868455471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3440899 + ... + 3624847.

It is an arithmetic number, because the mean of its divisors is an integer number (81337171500).

Almost surely, 2^649868455477 is an apocalyptic number.

It is an amenable number.

649868455477 is a deficient number, since it is larger than the sum of its proper divisors (828916523).

649868455477 is a wasteful number, since it uses less digits than its factorization.

649868455477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188435.

The product of its digits is 1625702400, while the sum is 73.

The spelling of 649868455477 in words is "six hundred forty-nine billion, eight hundred sixty-eight million, four hundred fifty-five thousand, four hundred seventy-seven".