253808065 has 16 divisors (see below), whose sum is σ = 349584768. Its totient is φ = 173287296.

The previous prime is 253808063. The next prime is 253808069. The reversal of 253808065 is 560808352.

It is not a de Polignac number, because 253808065 - 2¹ = 253808063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253808063) 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 15 ways as a sum of consecutive naturals, for example, 7407 + ... + 23716.

It is an arithmetic number, because the mean of its divisors is an integer number (21849048).

Almost surely, 2^253808065 is an apocalyptic number.

It is an amenable number.

253808065 is a deficient number, since it is larger than the sum of its proper divisors (95776703).

253808065 is a wasteful number, since it uses less digits than its factorization.

253808065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31368.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 253808065 is about 15931.3547760384. The cubic root of 253808065 is about 633.1429946645.

The spelling of 253808065 in words is "two hundred fifty-three million, eight hundred eight thousand, sixty-five".