647758222649 has 8 divisors (see below), whose sum is σ = 660522862272. Its totient is φ = 635118116400.

The previous prime is 647758222619. The next prime is 647758222711. The reversal of 647758222649 is 946222857746.

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

It is a cyclic number.

It is not a de Polignac number, because 647758222649 - 2²⁰ = 647757174073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 647758222591 and 647758222600.

It is not an unprimeable number, because it can be changed into a prime (647758222619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31122839 + ... + 31143644.

It is an arithmetic number, because the mean of its divisors is an integer number (82565357784).

Almost surely, 2^647758222649 is an apocalyptic number.

It is an amenable number.

647758222649 is a deficient number, since it is larger than the sum of its proper divisors (12764639623).

647758222649 is a wasteful number, since it uses less digits than its factorization.

647758222649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62266687.

The product of its digits is 81285120, while the sum is 62.

The spelling of 647758222649 in words is "six hundred forty-seven billion, seven hundred fifty-eight million, two hundred twenty-two thousand, six hundred forty-nine".