65500222603561 has 4 divisors (see below), whose sum is σ = 65685775642452. Its totient is φ = 65314669564672.

The previous prime is 65500222603511. The next prime is 65500222603567. The reversal of 65500222603561 is 16530622200556.

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 13735881378025 + 51764341225536 = 3706195^2 + 7194744^2 .

It is a cyclic number.

It is not a de Polignac number, because 65500222603561 - 2¹³ = 65500222595369 is a prime.

It is a super-2 number, since 2×65500222603561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65500222603567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92776518916 + ... + 92776519621.

It is an arithmetic number, because the mean of its divisors is an integer number (16421443910613).

Almost surely, 2^{65500222603561} is an apocalyptic number.

It is an amenable number.

65500222603561 is a deficient number, since it is larger than the sum of its proper divisors (185553038891).

65500222603561 is a wasteful number, since it uses less digits than its factorization.

65500222603561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185553038890.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 65500222603561 in words is "sixty-five trillion, five hundred billion, two hundred twenty-two million, six hundred three thousand, five hundred sixty-one".