616889745 has 12 divisors (see below), whose sum is σ = 1069275636. Its totient is φ = 329007840.

The previous prime is 616889723. The next prime is 616889747. The reversal of 616889745 is 547988616.

616889745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 298909521 + 317980224 = 17289^2 + 17832^2 .

It is not a de Polignac number, because 616889745 - 2⁶ = 616889681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616889691 and 616889700.

It is not an unprimeable number, because it can be changed into a prime (616889747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6854286 + ... + 6854375.

It is an arithmetic number, because the mean of its divisors is an integer number (89106303).

Almost surely, 2^616889745 is an apocalyptic number.

It is an amenable number.

616889745 is a deficient number, since it is larger than the sum of its proper divisors (452385891).

616889745 is a wasteful number, since it uses less digits than its factorization.

616889745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13708672 (or 13708669 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 616889745 is about 24837.2652480099. The cubic root of 616889745 is about 851.2736361954.

The spelling of 616889745 in words is "six hundred sixteen million, eight hundred eighty-nine thousand, seven hundred forty-five".