647360655 has 16 divisors (see below), whose sum is σ = 1036424160. Its totient is φ = 345043328.

The previous prime is 647360653. The next prime is 647360713. The reversal of 647360655 is 556063746.

It is a cyclic number.

It is not a de Polignac number, because 647360655 - 2¹ = 647360653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647360653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13009 + ... + 38261.

It is an arithmetic number, because the mean of its divisors is an integer number (64776510).

Almost surely, 2^647360655 is an apocalyptic number.

647360655 is a deficient number, since it is larger than the sum of its proper divisors (389063505).

647360655 is a wasteful number, since it uses less digits than its factorization.

647360655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26970.

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 647360655 is about 25443.2831018326. The cubic root of 647360655 is about 865.0650512963.

The spelling of 647360655 in words is "six hundred forty-seven million, three hundred sixty thousand, six hundred fifty-five".