64550705702647 has 4 divisors (see below), whose sum is σ = 64551247431840. Its totient is φ = 64550163973456.

The previous prime is 64550705702579. The next prime is 64550705702653. The reversal of 64550705702647 is 74620750705546.

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

It is a cyclic number.

It is not a de Polignac number, because 64550705702647 - 2¹¹ = 64550705700599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64550705702591 and 64550705702600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64550705702657) 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, 270685822 + ... + 270924187.

It is an arithmetic number, because the mean of its divisors is an integer number (16137811857960).

Almost surely, 2^{64550705702647} is an apocalyptic number.

64550705702647 is a deficient number, since it is larger than the sum of its proper divisors (541729193).

64550705702647 is a wasteful number, since it uses less digits than its factorization.

64550705702647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541729192.

The product of its (nonzero) digits is 49392000, while the sum is 58.

The spelling of 64550705702647 in words is "sixty-four trillion, five hundred fifty billion, seven hundred five million, seven hundred two thousand, six hundred forty-seven".