1620565068 has 12 divisors (see below), whose sum is σ = 3781318520. Its totient is φ = 540188352.

The previous prime is 1620565061. The next prime is 1620565091. The reversal of 1620565068 is 8605650261.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1620565068² = 5252462279243689248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620565061) 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, 67523533 + ... + 67523556.

Almost surely, 2^1620565068 is an apocalyptic number.

It is an amenable number.

1620565068 is an abundant number, since it is smaller than the sum of its proper divisors (2160753452).

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

1620565068 is a wasteful number, since it uses less digits than its factorization.

1620565068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135047096 (or 135047094 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1620565068 is about 40256.2425966458. The cubic root of 1620565068 is about 1174.5968299600.

The spelling of 1620565068 in words is "one billion, six hundred twenty million, five hundred sixty-five thousand, sixty-eight".