820462565 has 16 divisors (see below), whose sum is σ = 1061641728. Its totient is φ = 605107776.

The previous prime is 820462547. The next prime is 820462567. The reversal of 820462565 is 565264028.

It is not a de Polignac number, because 820462565 - 2⁶ = 820462501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820462567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46124 + ... + 61386.

It is an arithmetic number, because the mean of its divisors is an integer number (66352608).

Almost surely, 2^820462565 is an apocalyptic number.

It is an amenable number.

820462565 is a deficient number, since it is larger than the sum of its proper divisors (241179163).

820462565 is a wasteful number, since it uses less digits than its factorization.

820462565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16108.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 820462565 is about 28643.7177230889. The cubic root of 820462565 is about 936.1661277223.

The spelling of 820462565 in words is "eight hundred twenty million, four hundred sixty-two thousand, five hundred sixty-five".