65280085 has 16 divisors (see below), whose sum is σ = 89325936. Its totient is φ = 45370368.

The previous prime is 65280053. The next prime is 65280091. The reversal of 65280085 is 58008256.

It can be written as a sum of positive squares in 8 ways, for example, as 5171076 + 60109009 = 2274^2 + 7753^2 .

It is a cyclic number.

It is not a de Polignac number, because 65280085 - 2⁵ = 65280053 is a prime.

It is a super-2 number, since 2×65280085² = 8522978995214450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65280085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28434 + ... + 30643.

It is an arithmetic number, because the mean of its divisors is an integer number (5582871).

Almost surely, 2^65280085 is an apocalyptic number.

65280085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65280085 is a deficient number, since it is larger than the sum of its proper divisors (24045851).

65280085 is a wasteful number, since it uses less digits than its factorization.

65280085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59112.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 65280085 is about 8079.6092108468. The cubic root of 65280085 is about 402.6492585849.

The spelling of 65280085 in words is "sixty-five million, two hundred eighty thousand, eighty-five".