65818354261 has 12 divisors (see below), whose sum is σ = 72353115072. Its totient is φ = 59828813000.

The previous prime is 65818354253. The next prime is 65818354331. The reversal of 65818354261 is 16245381856.

It is not a de Polignac number, because 65818354261 - 2³ = 65818354253 is a prime.

It is a super-2 number, since 2×65818354261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65818354361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1541166 + ... + 1583296.

It is an arithmetic number, because the mean of its divisors is an integer number (6029426256).

Almost surely, 2^65818354261 is an apocalyptic number.

It is an amenable number.

65818354261 is a deficient number, since it is larger than the sum of its proper divisors (6534760811).

65818354261 is a wasteful number, since it uses less digits than its factorization.

65818354261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55064 (or 55053 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

The spelling of 65818354261 in words is "sixty-five billion, eight hundred eighteen million, three hundred fifty-four thousand, two hundred sixty-one".