616105520 has 20 divisors (see below), whose sum is σ = 1432445520. Its totient is φ = 246442176.

The previous prime is 616105513. The next prime is 616105547. The reversal of 616105520 is 25501616.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 616105520.

It is an unprimeable number.

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, 3850580 + ... + 3850739.

It is an arithmetic number, because the mean of its divisors is an integer number (71622276).

Almost surely, 2^616105520 is an apocalyptic number.

It is an amenable number.

616105520 is an abundant number, since it is smaller than the sum of its proper divisors (816340000).

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

616105520 is a wasteful number, since it uses less digits than its factorization.

616105520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701332 (or 7701326 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 616105520 is about 24821.4729619336. The cubic root of 616105520 is about 850.9127542251.

The spelling of 616105520 in words is "six hundred sixteen million, one hundred five thousand, five hundred twenty".