647621046249 has 8 divisors (see below), whose sum is σ = 863499306432. Its totient is φ = 431745075120.

The previous prime is 647621046229. The next prime is 647621046263. The reversal of 647621046249 is 942640126746.

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

It is not a de Polignac number, because 647621046249 - 2⁵ = 647621046217 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (647621046229) 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, 261372 + ... + 1167714.

It is an arithmetic number, because the mean of its divisors is an integer number (107937413304).

Almost surely, 2^647621046249 is an apocalyptic number.

It is an amenable number.

647621046249 is a deficient number, since it is larger than the sum of its proper divisors (215878260183).

647621046249 is a wasteful number, since it uses less digits than its factorization.

647621046249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144527.

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 647621046249 in words is "six hundred forty-seven billion, six hundred twenty-one million, forty-six thousand, two hundred forty-nine".