65485321801 has 9 divisors (see below), whose sum is σ = 69568613941. Its totient is φ = 61629149632.

The previous prime is 65485321799. The next prime is 65485321813. The reversal of 65485321801 is 10812358456.

The square root of 65485321801 is 255901.

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

It can be written as a sum of positive squares in 4 ways, for example, as 38161231801 + 27324090000 = 195349^2 + 165300^2 .

It is not a de Polignac number, because 65485321801 - 2¹ = 65485321799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65485321841) 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, 4342791 + ... + 4357843.

Almost surely, 2^65485321801 is an apocalyptic number.

65485321801 is the 255901-st square number.

65485321801 is the 127951-st centered octagonal number.

It is an amenable number.

65485321801 is a deficient number, since it is larger than the sum of its proper divisors (4083292140).

65485321801 is an frugal number, since it uses more digits than its factorization.

65485321801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30140 (or 15070 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 65485321801 in words is "sixty-five billion, four hundred eighty-five million, three hundred twenty-one thousand, eight hundred one".