65243276083561 has 9 divisors (see below), whose sum is σ = 65353855794231. Its totient is φ = 65132883200784.

The previous prime is 65243276083547. The next prime is 65243276083603. The reversal of 65243276083561 is 16538067234256.

The square root of 65243276083561 is 8077331.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 37167690233961 + 28075585849600 = 6096531^2 + 5298640^2 .

It is not a de Polignac number, because 65243276083561 - 2²¹ = 65243273986409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65243276083496 and 65243276083505.

It is not an unprimeable number, because it can be changed into a prime (65243276383561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4999861365 + ... + 4999874413.

Almost surely, 2^{65243276083561} is an apocalyptic number.

65243276083561 is the 8077331-st square number.

65243276083561 is the 4038666-th centered octagonal number.

It is an amenable number.

65243276083561 is a deficient number, since it is larger than the sum of its proper divisors (110579710670).

65243276083561 is an frugal number, since it uses more digits than its factorization.

65243276083561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27336 (or 13668 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 58.

The spelling of 65243276083561 in words is "sixty-five trillion, two hundred forty-three billion, two hundred seventy-six million, eighty-three thousand, five hundred sixty-one".