65861168231 has 4 divisors (see below), whose sum is σ = 65885773512. Its totient is φ = 65836562952.

The previous prime is 65861168183. The next prime is 65861168249. The reversal of 65861168231 is 13286116856.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65861168231 - 2¹⁸ = 65860906087 is a prime.

It is a super-2 number, since 2×65861168231² (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 (65861168281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12298625 + ... + 12303978.

It is an arithmetic number, because the mean of its divisors is an integer number (16471443378).

Almost surely, 2^65861168231 is an apocalyptic number.

65861168231 is a deficient number, since it is larger than the sum of its proper divisors (24605281).

65861168231 is a wasteful number, since it uses less digits than its factorization.

65861168231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24605280.

The product of its digits is 414720, while the sum is 47.

The spelling of 65861168231 in words is "sixty-five billion, eight hundred sixty-one million, one hundred sixty-eight thousand, two hundred thirty-one".