1612565020 has 24 divisors (see below), whose sum is σ = 3694240368. Its totient is φ = 586387200.

The previous prime is 1612565011. The next prime is 1612565021. The reversal of 1612565020 is 205652161.

It is a self number, because there is not a number n which added to its sum of digits gives 1612565020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612565021) 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 7 ways as a sum of consecutive naturals, for example, 3664701 + ... + 3665140.

It is an arithmetic number, because the mean of its divisors is an integer number (153926682).

Almost surely, 2^1612565020 is an apocalyptic number.

1612565020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1612565020 is an abundant number, since it is smaller than the sum of its proper divisors (2081675348).

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

1612565020 is a wasteful number, since it uses less digits than its factorization.

1612565020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329861 (or 7329859 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1612565020 is about 40156.7555960389. The cubic root of 1612565020 is about 1172.6608105457.

The spelling of 1612565020 in words is "one billion, six hundred twelve million, five hundred sixty-five thousand, twenty".