65257855 has 32 divisors (see below), whose sum is σ = 88397568. Its totient is φ = 45926400.

The previous prime is 65257853. The next prime is 65257873. The reversal of 65257855 is 55875256.

It is not a de Polignac number, because 65257855 - 2¹ = 65257853 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 (65257853) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 124995 + ... + 125515.

It is an arithmetic number, because the mean of its divisors is an integer number (2762424).

Almost surely, 2^65257855 is an apocalyptic number.

65257855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65257855 is a deficient number, since it is larger than the sum of its proper divisors (23139713).

65257855 is a wasteful number, since it uses less digits than its factorization.

65257855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627.

The product of its digits is 420000, while the sum is 43.

The square root of 65257855 is about 8078.2334083635. The cubic root of 65257855 is about 402.6035483235.

The spelling of 65257855 in words is "sixty-five million, two hundred fifty-seven thousand, eight hundred fifty-five".