65394785511 has 40 divisors (see below), whose sum is σ = 106614761088. Its totient is φ = 39616290000.

The previous prime is 65394785509. The next prime is 65394785527. The reversal of 65394785511 is 11558749356.

65394785511 is a `hidden beast` number, since 6 + 5 + 3 + 9 + 47 + 85 + 511 = 666.

It is not a de Polignac number, because 65394785511 - 2¹ = 65394785509 is a prime.

It is a super-2 number, since 2×65394785511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65394785531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2258556 + ... + 2287326.

Almost surely, 2^65394785511 is an apocalyptic number.

65394785511 is a deficient number, since it is larger than the sum of its proper divisors (41219975577).

65394785511 is a wasteful number, since it uses less digits than its factorization.

65394785511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31345 (or 31336 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The spelling of 65394785511 in words is "sixty-five billion, three hundred ninety-four million, seven hundred eighty-five thousand, five hundred eleven".