647326660947 has 8 divisors (see below), whose sum is σ = 863108376000. Its totient is φ = 431548026600.

The previous prime is 647326660933. The next prime is 647326660979. The reversal of 647326660947 is 749066623746.

It is a happy number.

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

It is not a de Polignac number, because 647326660947 - 2⁸ = 647326660691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647326660927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224697 + ... + 1159802.

It is an arithmetic number, because the mean of its divisors is an integer number (107888547000).

Almost surely, 2^647326660947 is an apocalyptic number.

647326660947 is a deficient number, since it is larger than the sum of its proper divisors (215781715053).

647326660947 is a wasteful number, since it uses less digits than its factorization.

647326660947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540353.

The product of its (nonzero) digits is 54867456, while the sum is 60.

The spelling of 647326660947 in words is "six hundred forty-seven billion, three hundred twenty-six million, six hundred sixty thousand, nine hundred forty-seven".