647722306911 has 4 divisors (see below), whose sum is σ = 863629742552. Its totient is φ = 431814871272.

The previous prime is 647722306901. The next prime is 647722306937. The reversal of 647722306911 is 119603227746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 647722306911 - 2⁵ = 647722306879 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 (647722306901) 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, 107953717816 + ... + 107953717821.

It is an arithmetic number, because the mean of its divisors is an integer number (215907435638).

Almost surely, 2^647722306911 is an apocalyptic number.

647722306911 is a deficient number, since it is larger than the sum of its proper divisors (215907435641).

647722306911 is a wasteful number, since it uses less digits than its factorization.

647722306911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215907435640.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 647722306911 in words is "six hundred forty-seven billion, seven hundred twenty-two million, three hundred six thousand, nine hundred eleven".