647647706494 has 8 divisors (see below), whose sum is σ = 971475820848. Its totient is φ = 323822432880.

The previous prime is 647647706477. The next prime is 647647706507. The reversal of 647647706494 is 494607746746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3034 + ... + 1138114.

It is an arithmetic number, because the mean of its divisors is an integer number (121434477606).

Almost surely, 2^647647706494 is an apocalyptic number.

647647706494 is a deficient number, since it is larger than the sum of its proper divisors (323828114354).

647647706494 is a wasteful number, since it uses less digits than its factorization.

647647706494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420370.

The product of its (nonzero) digits is 170698752, while the sum is 64.

The spelling of 647647706494 in words is "six hundred forty-seven billion, six hundred forty-seven million, seven hundred six thousand, four hundred ninety-four".