616630613 has 4 divisors (see below), whose sum is σ = 652903020. Its totient is φ = 580358208.

The previous prime is 616630607. The next prime is 616630643. The reversal of 616630613 is 316036616.

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

It can be written as a sum of positive squares in 2 ways, for example, as 540190564 + 76440049 = 23242^2 + 8743^2 .

It is a cyclic number.

It is not a de Polignac number, because 616630613 - 2²² = 612436309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616630613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616630643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18136178 + ... + 18136211.

It is an arithmetic number, because the mean of its divisors is an integer number (163225755).

Almost surely, 2^616630613 is an apocalyptic number.

It is an amenable number.

616630613 is a deficient number, since it is larger than the sum of its proper divisors (36272407).

616630613 is a wasteful number, since it uses less digits than its factorization.

616630613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36272406.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 616630613 is about 24832.0481032073. The cubic root of 616630613 is about 851.1544235720.

The spelling of 616630613 in words is "six hundred sixteen million, six hundred thirty thousand, six hundred thirteen".