616636799 has 4 divisors (see below), whose sum is σ = 616989120. Its totient is φ = 616284480.

The previous prime is 616636793. The next prime is 616636847. The reversal of 616636799 is 997636616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616636799 - 2¹² = 616632703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616636799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616636793) 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, 173522 + ... + 177039.

It is an arithmetic number, because the mean of its divisors is an integer number (154247280).

Almost surely, 2^616636799 is an apocalyptic number.

616636799 is a deficient number, since it is larger than the sum of its proper divisors (352321).

616636799 is a wasteful number, since it uses less digits than its factorization.

616636799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352320.

The product of its digits is 2204496, while the sum is 53.

The square root of 616636799 is about 24832.1726596768. The cubic root of 616636799 is about 851.1572698053.

The spelling of 616636799 in words is "six hundred sixteen million, six hundred thirty-six thousand, seven hundred ninety-nine".