616040689 has 4 divisors (see below), whose sum is σ = 672044400. Its totient is φ = 560036980.

The previous prime is 616040683. The next prime is 616040693. The reversal of 616040689 is 986040616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616040689 - 2²⁹ = 79169777 is a prime.

It is a super-2 number, since 2×616040689² = 759012261007189442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616040683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28001839 + ... + 28001860.

It is an arithmetic number, because the mean of its divisors is an integer number (168011100).

Almost surely, 2^616040689 is an apocalyptic number.

It is an amenable number.

616040689 is a deficient number, since it is larger than the sum of its proper divisors (56003711).

616040689 is a wasteful number, since it uses less digits than its factorization.

616040689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56003710.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 616040689 is about 24820.1669817107. The cubic root of 616040689 is about 850.8829068163.

The spelling of 616040689 in words is "six hundred sixteen million, forty thousand, six hundred eighty-nine".