65540067297855 has 16 divisors (see below), whose sum is σ = 109423416706560. Its totient is φ = 33434932882208.

The previous prime is 65540067297853. The next prime is 65540067297907. The reversal of 65540067297855 is 55879276004556.

It is a cyclic number.

It is not a de Polignac number, because 65540067297855 - 2¹ = 65540067297853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 65540067297855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65540067297853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94985604435 + ... + 94985605124.

It is an arithmetic number, because the mean of its divisors is an integer number (6838963544160).

Almost surely, 2^{65540067297855} is an apocalyptic number.

65540067297855 is a deficient number, since it is larger than the sum of its proper divisors (43883349408705).

65540067297855 is a wasteful number, since it uses less digits than its factorization.

65540067297855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189971209590.

The product of its (nonzero) digits is 635040000, while the sum is 69.

The spelling of 65540067297855 in words is "sixty-five trillion, five hundred forty billion, sixty-seven million, two hundred ninety-seven thousand, eight hundred fifty-five".