647704067937 has 8 divisors (see below), whose sum is σ = 870405467136. Its totient is φ = 428402690352.

The previous prime is 647704067897. The next prime is 647704067993. The reversal of 647704067937 is 739760407746.

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

It is not a de Polignac number, because 647704067937 - 2¹⁹ = 647703543649 is a prime.

It is a super-2 number, since 2×647704067937² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647704067137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 850004958 + ... + 850005719.

It is an arithmetic number, because the mean of its divisors is an integer number (108800683392).

Almost surely, 2^647704067937 is an apocalyptic number.

It is an amenable number.

647704067937 is a deficient number, since it is larger than the sum of its proper divisors (222701399199).

647704067937 is a wasteful number, since it uses less digits than its factorization.

647704067937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700010807.

The product of its (nonzero) digits is 37340352, while the sum is 60.

The spelling of 647704067937 in words is "six hundred forty-seven billion, seven hundred four million, sixty-seven thousand, nine hundred thirty-seven".