616495993 has 8 divisors (see below), whose sum is σ = 621563400. Its totient is φ = 611441280.

The previous prime is 616495991. The next prime is 616496047. The reversal of 616495993 is 399594616.

It can be written as a sum of positive squares in 4 ways, for example, as 15657849 + 600838144 = 3957^2 + 24512^2 .

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 616495993 - 2¹ = 616495991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616495993.

It is not an unprimeable number, because it can be changed into a prime (616495991) 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, 110671 + ... + 116107.

It is an arithmetic number, because the mean of its divisors is an integer number (77695425).

Almost surely, 2^616495993 is an apocalyptic number.

It is an amenable number.

616495993 is a deficient number, since it is larger than the sum of its proper divisors (5067407).

616495993 is a wasteful number, since it uses less digits than its factorization.

616495993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347.

The product of its digits is 1574640, while the sum is 52.

The square root of 616495993 is about 24829.3373451649. The cubic root of 616495993 is about 851.0924790056.

The spelling of 616495993 in words is "six hundred sixteen million, four hundred ninety-five thousand, nine hundred ninety-three".