613908856 has 64 divisors (see below), whose sum is σ = 1277153280. Its totient is φ = 274337280.

The previous prime is 613908853. The next prime is 613908863. The reversal of 613908856 is 658809316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613908853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821520 + ... + 1821856.

It is an arithmetic number, because the mean of its divisors is an integer number (19955520).

Almost surely, 2^613908856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 613908856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638576640).

613908856 is an abundant number, since it is smaller than the sum of its proper divisors (663244424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613908856 is a wasteful number, since it uses less digits than its factorization.

613908856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 613908856 is about 24777.1841822270. The cubic root of 613908856 is about 849.9002678835.

The spelling of 613908856 in words is "six hundred thirteen million, nine hundred eight thousand, eight hundred fifty-six".