647601506 has 4 divisors (see below), whose sum is σ = 971402262. Its totient is φ = 323800752.

The previous prime is 647601499. The next prime is 647601517. The reversal of 647601506 is 605106746.

647601506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605106746 = 2 ⋅302553373.

It can be written as a sum of positive squares in only one way, i.e., 388681225 + 258920281 = 19715^2 + 16091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161900375 + ... + 161900378.

Almost surely, 2^647601506 is an apocalyptic number.

647601506 is a deficient number, since it is larger than the sum of its proper divisors (323800756).

647601506 is a wasteful number, since it uses less digits than its factorization.

647601506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323800755.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 647601506 is about 25448.0157576185. The cubic root of 647601506 is about 865.1723206869.

It can be divided in two parts, 64760 and 1506, that added together give a palindrome (66266).

The spelling of 647601506 in words is "six hundred forty-seven million, six hundred one thousand, five hundred six".