65161352511 has 24 divisors (see below), whose sum is σ = 99094601840. Its totient is φ = 41146704000.

The previous prime is 65161352497. The next prime is 65161352533. The reversal of 65161352511 is 11525316156.

65161352511 is a `hidden beast` number, since 6 + 5 + 1 + 6 + 135 + 2 + 511 = 666.

It is not a de Polignac number, because 65161352511 - 2⁶ = 65161352447 is a prime.

It is a super-2 number, since 2×65161352511² (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 (65161353511) 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, 941451 + ... + 1008291.

Almost surely, 2^65161352511 is an apocalyptic number.

65161352511 is a deficient number, since it is larger than the sum of its proper divisors (33933249329).

65161352511 is a wasteful number, since it uses less digits than its factorization.

65161352511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72567 (or 72564 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

Adding to 65161352511 its reverse (11525316156), we get a palindrome (76686668667).

The spelling of 65161352511 in words is "sixty-five billion, one hundred sixty-one million, three hundred fifty-two thousand, five hundred eleven".