616805137 has 8 divisors (see below), whose sum is σ = 664445096. Its totient is φ = 569192832.

The previous prime is 616805093. The next prime is 616805159. The reversal of 616805137 is 731508616.

It can be written as a sum of positive squares in 4 ways, for example, as 226576 + 616578561 = 476^2 + 24831^2 .

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

It is not a de Polignac number, because 616805137 - 2¹⁹ = 616280849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616805096 and 616805105.

It is not an unprimeable number, because it can be changed into a prime (616805177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79453 + ... + 86869.

It is an arithmetic number, because the mean of its divisors is an integer number (83055637).

Almost surely, 2^616805137 is an apocalyptic number.

It is an amenable number.

616805137 is a deficient number, since it is larger than the sum of its proper divisors (47639959).

616805137 is a wasteful number, since it uses less digits than its factorization.

616805137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 616805137 is about 24835.5619425049. The cubic root of 616805137 is about 851.2347163001.

The spelling of 616805137 in words is "six hundred sixteen million, eight hundred five thousand, one hundred thirty-seven".