609928660647 has 24 divisors (see below), whose sum is σ = 884687746176. Its totient is φ = 404921696256.

The previous prime is 609928660639. The next prime is 609928660667. The reversal of 609928660647 is 746066829906.

It is not a de Polignac number, because 609928660647 - 2³ = 609928660639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609928660667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8515498 + ... + 8586824.

It is an arithmetic number, because the mean of its divisors is an integer number (36861989424).

Almost surely, 2^609928660647 is an apocalyptic number.

609928660647 is a deficient number, since it is larger than the sum of its proper divisors (274759085529).

609928660647 is a wasteful number, since it uses less digits than its factorization.

609928660647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75287 (or 75284 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 609928660647 in words is "six hundred nine billion, nine hundred twenty-eight million, six hundred sixty thousand, six hundred forty-seven".