65261220664119 has 4 divisors (see below), whose sum is σ = 87014960885496. Its totient is φ = 43507480442744.

The previous prime is 65261220664067. The next prime is 65261220664139. The reversal of 65261220664119 is 91146602216256.

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

It is a cyclic number.

It is not a de Polignac number, because 65261220664119 - 2¹² = 65261220660023 is a prime.

It is a super-2 number, since 2×65261220664119² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65261220664139) 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, 10876870110684 + ... + 10876870110689.

It is an arithmetic number, because the mean of its divisors is an integer number (21753740221374).

Almost surely, 2^{65261220664119} is an apocalyptic number.

65261220664119 is a deficient number, since it is larger than the sum of its proper divisors (21753740221377).

65261220664119 is a wasteful number, since it uses less digits than its factorization.

65261220664119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753740221376.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 65261220664119 in words is "sixty-five trillion, two hundred sixty-one billion, two hundred twenty million, six hundred sixty-four thousand, one hundred nineteen".