649726803847 has 24 divisors (see below), whose sum is σ = 729134911008. Its totient is φ = 578323437120.

The previous prime is 649726803841. The next prime is 649726803871. The reversal of 649726803847 is 748308627946.

It is not a de Polignac number, because 649726803847 - 2¹¹ = 649726801799 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 (649726803841) 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 23 ways as a sum of consecutive naturals, for example, 3019113 + ... + 3227149.

It is an arithmetic number, because the mean of its divisors is an integer number (30380621292).

Almost surely, 2^649726803847 is an apocalyptic number.

649726803847 is a deficient number, since it is larger than the sum of its proper divisors (79408107161).

649726803847 is a wasteful number, since it uses less digits than its factorization.

649726803847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208599 (or 208588 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 64.

The spelling of 649726803847 in words is "six hundred forty-nine billion, seven hundred twenty-six million, eight hundred three thousand, eight hundred forty-seven".