649516647 has 8 divisors (see below), whose sum is σ = 932639344. Its totient is φ = 399702528.

The previous prime is 649516639. The next prime is 649516667. The reversal of 649516647 is 746615946.

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

It is not a de Polignac number, because 649516647 - 2³ = 649516639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649516596 and 649516605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649516627) 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, 8327098 + ... + 8327175.

It is an arithmetic number, because the mean of its divisors is an integer number (116579918).

Almost surely, 2^649516647 is an apocalyptic number.

649516647 is a deficient number, since it is larger than the sum of its proper divisors (283122697).

649516647 is a wasteful number, since it uses less digits than its factorization.

649516647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16654289.

The product of its digits is 1088640, while the sum is 48.

The square root of 649516647 is about 25485.6164728264. The cubic root of 649516647 is about 866.0243345216.

The spelling of 649516647 in words is "six hundred forty-nine million, five hundred sixteen thousand, six hundred forty-seven".