65520000000001 has 4 divisors (see below), whose sum is σ = 65522049261012. Its totient is φ = 65517950738992.

The previous prime is 65519999999999. The next prime is 65520000000011. The reversal of 65520000000001 is 10000000002556.

It is a happy number.

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 56367075855601 + 9152924144400 = 7507801^2 + 3025380^2 .

It is a cyclic number.

It is not a de Polignac number, because 65520000000001 - 2¹ = 65519999999999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65519999999897 and 65519999999906.

It is not an unprimeable number, because it can be changed into a prime (65520000000011) 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, 1024582546 + ... + 1024646491.

It is an arithmetic number, because the mean of its divisors is an integer number (16380512315253).

Almost surely, 2^{65520000000001} is an apocalyptic number.

It is an amenable number.

65520000000001 is a deficient number, since it is larger than the sum of its proper divisors (2049261011).

65520000000001 is a wasteful number, since it uses less digits than its factorization.

65520000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049261010.

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 65520000000001 its reverse (10000000002556), we get a palindrome (75520000002557).

The spelling of 65520000000001 in words is "sixty-five trillion, five hundred twenty billion, one", and thus it is an aban number.