647823350870385 has 64 divisors (see below), whose sum is σ = 1042627009966080. Its totient is φ = 343474211082240.

The previous prime is 647823350870243. The next prime is 647823350870393. The reversal of 647823350870385 is 583078053328746.

It is not a de Polignac number, because 647823350870385 - 2²⁸ = 647823082434929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6321348345 + ... + 6321450825.

It is an arithmetic number, because the mean of its divisors is an integer number (16291047030720).

Almost surely, 2^{647823350870385} is an apocalyptic number.

It is an amenable number.

647823350870385 is a deficient number, since it is larger than the sum of its proper divisors (394803659095695).

647823350870385 is a wasteful number, since it uses less digits than its factorization.

647823350870385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105498.

The product of its (nonzero) digits is 812851200, while the sum is 69.

The spelling of 647823350870385 in words is "six hundred forty-seven trillion, eight hundred twenty-three billion, three hundred fifty million, eight hundred seventy thousand, three hundred eighty-five".