65220515612138 has 8 divisors (see below), whose sum is σ = 98006412151332. Its totient is φ = 32551711561696.

The previous prime is 65220515612093. The next prime is 65220515612209. The reversal of 65220515612138 is 83121651502256.

It can be written as a sum of positive squares in 2 ways, for example, as 45094139357089 + 20126376255049 = 6715217^2 + 4486243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65220515612092 and 65220515612101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29273120795 + ... + 29273123022.

Almost surely, 2^{65220515612138} is an apocalyptic number.

65220515612138 is a deficient number, since it is larger than the sum of its proper divisors (32785896539194).

65220515612138 is a wasteful number, since it uses less digits than its factorization.

65220515612138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58546244376.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 65220515612138 in words is "sixty-five trillion, two hundred twenty billion, five hundred fifteen million, six hundred twelve thousand, one hundred thirty-eight".