647530671678 has 16 divisors (see below), whose sum is σ = 1412794192896. Its totient is φ = 196221415640.

The previous prime is 647530671659. The next prime is 647530671709. The reversal of 647530671678 is 876176035746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4905535326 + ... + 4905535457.

It is an arithmetic number, because the mean of its divisors is an integer number (88299637056).

Almost surely, 2^647530671678 is an apocalyptic number.

647530671678 is an abundant number, since it is smaller than the sum of its proper divisors (765263521218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647530671678 is a wasteful number, since it uses less digits than its factorization.

647530671678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9811070799.

The product of its (nonzero) digits is 35562240, while the sum is 60.

The spelling of 647530671678 in words is "six hundred forty-seven billion, five hundred thirty million, six hundred seventy-one thousand, six hundred seventy-eight".