2520856065 has 192 divisors, whose sum is σ = 5446103040. Its totient is φ = 966712320.

The previous prime is 2520856057. The next prime is 2520856069. The reversal of 2520856065 is 5606580252.

It is a happy number.

It is not a de Polignac number, because 2520856065 - 2³ = 2520856057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2520856069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 35504980 + ... + 35505050.

It is an arithmetic number, because the mean of its divisors is an integer number (28365120).

Almost surely, 2^2520856065 is an apocalyptic number.

It is an amenable number.

2520856065 is an abundant number, since it is smaller than the sum of its proper divisors (2925246975).

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

2520856065 is a wasteful number, since it uses less digits than its factorization.

2520856065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 2520856065 is about 50208.1274795227. The cubic root of 2520856065 is about 1360.9724995312.

The spelling of 2520856065 in words is "two billion, five hundred twenty million, eight hundred fifty-six thousand, sixty-five".