65220515612139 has 4 divisors (see below), whose sum is σ = 86960687482856. Its totient is φ = 43480343741424.

The previous prime is 65220515612093. The next prime is 65220515612209. The reversal of 65220515612139 is 93121651502256.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65220515612139 - 2¹⁵ = 65220515579371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65220515612339) 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, 10870085935354 + ... + 10870085935359.

It is an arithmetic number, because the mean of its divisors is an integer number (21740171870714).

Almost surely, 2^{65220515612139} is an apocalyptic number.

65220515612139 is a deficient number, since it is larger than the sum of its proper divisors (21740171870717).

65220515612139 is a wasteful number, since it uses less digits than its factorization.

65220515612139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21740171870716.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 65220515612139 in words is "sixty-five trillion, two hundred twenty billion, five hundred fifteen million, six hundred twelve thousand, one hundred thirty-nine".