616204409 has 8 divisors (see below), whose sum is σ = 650052480. Its totient is φ = 582498000.

The previous prime is 616204403. The next prime is 616204429. The reversal of 616204409 is 904402616.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616204409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616204403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26417 + ... + 43934.

It is an arithmetic number, because the mean of its divisors is an integer number (81256560).

Almost surely, 2^616204409 is an apocalyptic number.

It is an amenable number.

616204409 is a deficient number, since it is larger than the sum of its proper divisors (33848071).

616204409 is a wasteful number, since it uses less digits than its factorization.

616204409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70831.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 616204409 is about 24823.4648870781. The cubic root of 616204409 is about 850.9582774929.

The spelling of 616204409 in words is "six hundred sixteen million, two hundred four thousand, four hundred nine".