639360852247 has 32 divisors (see below), whose sum is σ = 717954564096. Its totient is φ = 565573881600.

The previous prime is 639360852241. The next prime is 639360852259. The reversal of 639360852247 is 742258063936.

It is not a de Polignac number, because 639360852247 - 2¹¹ = 639360850199 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 (639360852241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7753122 + ... + 7835152.

It is an arithmetic number, because the mean of its divisors is an integer number (22436080128).

Almost surely, 2^639360852247 is an apocalyptic number.

639360852247 is a deficient number, since it is larger than the sum of its proper divisors (78593711849).

639360852247 is a wasteful number, since it uses less digits than its factorization.

639360852247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82351.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 639360852247 in words is "six hundred thirty-nine billion, three hundred sixty million, eight hundred fifty-two thousand, two hundred forty-seven".