616516647 has 16 divisors (see below), whose sum is σ = 836595840. Its totient is φ = 403758432.

The previous prime is 616516639. The next prime is 616516651. The reversal of 616516647 is 746615616.

It is a happy number.

It is not a de Polignac number, because 616516647 - 2³ = 616516639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616516599 and 616516608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616516627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72133 + ... + 80225.

It is an arithmetic number, because the mean of its divisors is an integer number (52287240).

Almost surely, 2^616516647 is an apocalyptic number.

616516647 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

616516647 is a deficient number, since it is larger than the sum of its proper divisors (220079193).

616516647 is a wasteful number, since it uses less digits than its factorization.

616516647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542.

The product of its digits is 181440, while the sum is 42.

The square root of 616516647 is about 24829.7532609569. The cubic root of 616516647 is about 851.1019834025.

The spelling of 616516647 in words is "six hundred sixteen million, five hundred sixteen thousand, six hundred forty-seven".