647331834672 has 80 divisors (see below), whose sum is σ = 1967381088480. Its totient is φ = 203084494848.

The previous prime is 647331834637. The next prime is 647331834707. The reversal of 647331834672 is 276438133746.

647331834672 is a `hidden beast` number, since 6 + 4 + 73 + 31 + 83 + 467 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (647331834637) and next prime (647331834707).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44064813 + ... + 44079500.

It is an arithmetic number, because the mean of its divisors is an integer number (24592263606).

Almost surely, 2^647331834672 is an apocalyptic number.

It is an amenable number.

647331834672 is an abundant number, since it is smaller than the sum of its proper divisors (1320049253808).

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

647331834672 is a wasteful number, since it uses less digits than its factorization.

647331834672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88144347 (or 88144335 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 54.

The spelling of 647331834672 in words is "six hundred forty-seven billion, three hundred thirty-one million, eight hundred thirty-four thousand, six hundred seventy-two".