65640255111 has 24 divisors (see below), whose sum is σ = 99833235840. Its totient is φ = 41444816400.

The previous prime is 65640255103. The next prime is 65640255139. The reversal of 65640255111 is 11155204656.

65640255111 is a `hidden beast` number, since 6 + 5 + 640 + 2 + 5 + 5 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 65640255111 - 2³ = 65640255103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65640253111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 545716 + ... + 655046.

It is an arithmetic number, because the mean of its divisors is an integer number (4159718160).

Almost surely, 2^65640255111 is an apocalyptic number.

65640255111 is a deficient number, since it is larger than the sum of its proper divisors (34192980729).

65640255111 is a wasteful number, since it uses less digits than its factorization.

65640255111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112867 (or 112864 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 65640255111 its reverse (11155204656), we get a palindrome (76795459767).

The spelling of 65640255111 in words is "sixty-five billion, six hundred forty million, two hundred fifty-five thousand, one hundred eleven".