1565670620 has 12 divisors (see below), whose sum is σ = 3287908344. Its totient is φ = 626268240.

The previous prime is 1565670571. The next prime is 1565670671. The reversal of 1565670620 is 260765651.

1565670620 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39141746 + ... + 39141785.

It is an arithmetic number, because the mean of its divisors is an integer number (273992362).

Almost surely, 2^1565670620 is an apocalyptic number.

1565670620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1565670620 is an abundant number, since it is smaller than the sum of its proper divisors (1722237724).

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

1565670620 is a wasteful number, since it uses less digits than its factorization.

1565670620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78283540 (or 78283538 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1565670620 is about 39568.5559504008. Note that the first 3 decimals coincide. The cubic root of 1565670620 is about 1161.1815695352.

The spelling of 1565670620 in words is "one billion, five hundred sixty-five million, six hundred seventy thousand, six hundred twenty".