616545 has 16 divisors (see below), whose sum is σ = 1096320. Its totient is φ = 328752.

The previous prime is 616537. The next prime is 616547. The reversal of 616545 is 545616.

It is a happy number.

616545 is a `hidden beast` number, since 6 + 1 + 654 + 5 = 666.

It is not a de Polignac number, because 616545 - 2³ = 616537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616545.

It is not an unprimeable number, because it can be changed into a prime (616547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (68520).

2⁶¹⁶⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

616545 is a deficient number, since it is larger than the sum of its proper divisors (479775).

616545 is a wasteful number, since it uses less digits than its factorization.

616545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581 (or 4575 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 616545 is about 785.2037952022. The cubic root of 616545 is about 85.1115030320. Note that the first 3 decimals are identical.

The spelling of 616545 in words is "six hundred sixteen thousand, five hundred forty-five".