65165511655 has 16 divisors (see below), whose sum is σ = 78833525760. Its totient is φ = 51709335552.

The previous prime is 65165511641. The next prime is 65165511683. The reversal of 65165511655 is 55611556156.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65165511655 - 2⁷ = 65165511527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3285127 + ... + 3304903.

It is an arithmetic number, because the mean of its divisors is an integer number (4927095360).

Almost surely, 2^65165511655 is an apocalyptic number.

65165511655 is a deficient number, since it is larger than the sum of its proper divisors (13668014105).

65165511655 is a wasteful number, since it uses less digits than its factorization.

65165511655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25098.

The product of its digits is 675000, while the sum is 46.

The spelling of 65165511655 in words is "sixty-five billion, one hundred sixty-five million, five hundred eleven thousand, six hundred fifty-five".