65228649201 has 9 divisors (see below), whose sum is σ = 94220266699. Its totient is φ = 43485255336.

The previous prime is 65228649139. The next prime is 65228649203. The reversal of 65228649201 is 10294682256.

The square root of 65228649201 is 255399.

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

65228649201 is a `hidden beast` number, since 6 + 522 + 86 + 49 + 2 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9213120225 + 56015528976 = 95985^2 + 236676^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 65228649201 - 2¹¹ = 65228647153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65228649203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 723631 + ... + 808763.

Almost surely, 2^65228649201 is an apocalyptic number.

65228649201 is the 255399-th square number.

65228649201 is the 127700-th centered octagonal number.

It is an amenable number.

65228649201 is a deficient number, since it is larger than the sum of its proper divisors (28991617498).

65228649201 is an frugal number, since it uses more digits than its factorization.

65228649201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170272 (or 85136 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 65228649201 in words is "sixty-five billion, two hundred twenty-eight million, six hundred forty-nine thousand, two hundred one".