616562020 has 36 divisors (see below), whose sum is σ = 1303356852. Its totient is φ = 245001600.

The previous prime is 616561999. The next prime is 616562021. The reversal of 616562020 is 20265616.

It can be written as a sum of positive squares in 6 ways, for example, as 250145856 + 366416164 = 15816^2 + 19142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 616562020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616562021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654750 + ... + 655690.

It is an arithmetic number, because the mean of its divisors is an integer number (36204357).

Almost surely, 2^616562020 is an apocalyptic number.

It is an amenable number.

616562020 is an abundant number, since it is smaller than the sum of its proper divisors (686794832).

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

616562020 is a wasteful number, since it uses less digits than its factorization.

616562020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 616562020 is about 24830.6669262024. Note that the first 3 decimals coincide. The cubic root of 616562020 is about 851.1228620509.

The spelling of 616562020 in words is "six hundred sixteen million, five hundred sixty-two thousand, twenty".