65381774263 has 16 divisors (see below), whose sum is σ = 71178107616. Its totient is φ = 59698558080.

The previous prime is 65381774243. The next prime is 65381774267. The reversal of 65381774263 is 36247718356.

It is a cyclic number.

It is not a de Polignac number, because 65381774263 - 2¹³ = 65381766071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65381774263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65381774267) 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, 369268 + ... + 516838.

It is an arithmetic number, because the mean of its divisors is an integer number (4448631726).

Almost surely, 2^65381774263 is an apocalyptic number.

65381774263 is a deficient number, since it is larger than the sum of its proper divisors (5796333353).

65381774263 is a wasteful number, since it uses less digits than its factorization.

65381774263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147954.

The product of its digits is 5080320, while the sum is 52.

The spelling of 65381774263 in words is "sixty-five billion, three hundred eighty-one million, seven hundred seventy-four thousand, two hundred sixty-three".