647647706530 has 32 divisors (see below), whose sum is σ = 1284336139968. Its totient is φ = 233176488000.

The previous prime is 647647706513. The next prime is 647647706561. The reversal of 647647706530 is 35607746746.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29135952 + ... + 29158171.

It is an arithmetic number, because the mean of its divisors is an integer number (40135504374).

Almost surely, 2^647647706530 is an apocalyptic number.

647647706530 is a deficient number, since it is larger than the sum of its proper divisors (636688433438).

647647706530 is a wasteful number, since it uses less digits than its factorization.

647647706530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58294242.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 647647706530 in words is "six hundred forty-seven billion, six hundred forty-seven million, seven hundred six thousand, five hundred thirty".