65161065115551 has 8 divisors (see below), whose sum is σ = 89000479182384. Its totient is φ = 42381180562880.

The previous prime is 65161065115529. The next prime is 65161065115589. The reversal of 65161065115551 is 15551156016156.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65161065115551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65161065115551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161065115511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264882378396 + ... + 264882378641.

It is an arithmetic number, because the mean of its divisors is an integer number (11125059897798).

Almost surely, 2^{65161065115551} is an apocalyptic number.

65161065115551 is a deficient number, since it is larger than the sum of its proper divisors (23839414066833).

65161065115551 is a wasteful number, since it uses less digits than its factorization.

65161065115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529764757081.

The product of its (nonzero) digits is 675000, while the sum is 48.

The spelling of 65161065115551 in words is "sixty-five trillion, one hundred sixty-one billion, sixty-five million, one hundred fifteen thousand, five hundred fifty-one".