65361040 has 20 divisors (see below), whose sum is σ = 151964604. Its totient is φ = 26144384.

The previous prime is 65361029. The next prime is 65361047. The reversal of 65361040 is 4016356.

It can be written as a sum of positive squares in 2 ways, for example, as 45859984 + 19501056 = 6772^2 + 4416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 65360996 and 65361014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65361047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408427 + ... + 408586.

Almost surely, 2^65361040 is an apocalyptic number.

It is an amenable number.

65361040 is an abundant number, since it is smaller than the sum of its proper divisors (86603564).

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

65361040 is a wasteful number, since it uses less digits than its factorization.

65361040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817026 (or 817020 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 65361040 is about 8084.6174924977. The cubic root of 65361040 is about 402.8156340091.

Adding to 65361040 its reverse (4016356), we get a palindrome (69377396).

The spelling of 65361040 in words is "sixty-five million, three hundred sixty-one thousand, forty".