616560785 has 8 divisors (see below), whose sum is σ = 759869736. Its totient is φ = 479917440.

The previous prime is 616560757. The next prime is 616560787. The reversal of 616560785 is 587065616.

It can be written as a sum of positive squares in 4 ways, for example, as 207388801 + 409171984 = 14401^2 + 20228^2 .

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

It is not a de Polignac number, because 616560785 - 2¹⁰ = 616559761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616560787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1666196 + ... + 1666565.

It is an arithmetic number, because the mean of its divisors is an integer number (94983717).

Almost surely, 2^616560785 is an apocalyptic number.

It is an amenable number.

616560785 is a deficient number, since it is larger than the sum of its proper divisors (143308951).

616560785 is a wasteful number, since it uses less digits than its factorization.

616560785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332803.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 616560785 is about 24830.6420577479. The cubic root of 616560785 is about 851.1222937721.

The spelling of 616560785 in words is "six hundred sixteen million, five hundred sixty thousand, seven hundred eighty-five".