65383561 has 4 divisors (see below), whose sum is σ = 66978324. Its totient is φ = 63788800.

The previous prime is 65383559. The next prime is 65383567. The reversal of 65383561 is 16538356.

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 27499536 + 37884025 = 5244^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 65383561 - 2¹ = 65383559 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 65383561.

It is not an unprimeable number, because it can be changed into a prime (65383567) 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, 797320 + ... + 797401.

It is an arithmetic number, because the mean of its divisors is an integer number (16744581).

Almost surely, 2^65383561 is an apocalyptic number.

It is an amenable number.

65383561 is a deficient number, since it is larger than the sum of its proper divisors (1594763).

65383561 is a wasteful number, since it uses less digits than its factorization.

65383561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594762.

The product of its digits is 64800, while the sum is 37.

The square root of 65383561 is about 8086.0102028133. The cubic root of 65383561 is about 402.8618938257.

The spelling of 65383561 in words is "sixty-five million, three hundred eighty-three thousand, five hundred sixty-one".