616144345 has 16 divisors (see below), whose sum is σ = 797642640. Its totient is φ = 455163904.

The previous prime is 616144343. The next prime is 616144363. The reversal of 616144345 is 543441616.

It can be written as a sum of positive squares in 8 ways, for example, as 23319241 + 592825104 = 4829^2 + 24348^2 .

It is a cyclic number.

It is not a de Polignac number, because 616144345 - 2¹ = 616144343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616144345.

It is not an unprimeable number, because it can be changed into a prime (616144343) 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 15 ways as a sum of consecutive naturals, for example, 63880 + ... + 72889.

It is an arithmetic number, because the mean of its divisors is an integer number (49852665).

Almost surely, 2^616144345 is an apocalyptic number.

It is an amenable number.

616144345 is a deficient number, since it is larger than the sum of its proper divisors (181498295).

616144345 is a wasteful number, since it uses less digits than its factorization.

616144345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136844.

The product of its digits is 34560, while the sum is 34.

The square root of 616144345 is about 24822.2550345451. The cubic root of 616144345 is about 850.9306277834.

The spelling of 616144345 in words is "six hundred sixteen million, one hundred forty-four thousand, three hundred forty-five".