65112505 has 4 divisors (see below), whose sum is σ = 78135012. Its totient is φ = 52090000.

The previous prime is 65112491. The next prime is 65112539. The reversal of 65112505 is 50521156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22353984 + 42758521 = 4728^2 + 6539^2 .

It is not a de Polignac number, because 65112505 - 2²¹ = 63015353 is a prime.

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 65112505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6511246 + ... + 6511255.

It is an arithmetic number, because the mean of its divisors is an integer number (19533753).

Almost surely, 2^65112505 is an apocalyptic number.

It is an amenable number.

65112505 is a deficient number, since it is larger than the sum of its proper divisors (13022507).

65112505 is a wasteful number, since it uses less digits than its factorization.

65112505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13022506.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 65112505 is about 8069.2319956734. The cubic root of 65112505 is about 402.3044174068.

The spelling of 65112505 in words is "sixty-five million, one hundred twelve thousand, five hundred five".