865442504211 has 8 divisors (see below), whose sum is σ = 1154235985344. Its totient is φ = 576805346280.

The previous prime is 865442504191. The next prime is 865442504233. The reversal of 865442504211 is 112405244568.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 865442504211 - 2¹⁰ = 865442503187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865442704211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39067881 + ... + 39090026.

It is an arithmetic number, because the mean of its divisors is an integer number (144279498168).

Almost surely, 2^865442504211 is an apocalyptic number.

865442504211 is a deficient number, since it is larger than the sum of its proper divisors (288793481133).

865442504211 is a wasteful number, since it uses less digits than its factorization.

865442504211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78161601.

The product of its (nonzero) digits is 307200, while the sum is 42.

Adding to 865442504211 its reverse (112405244568), we get a palindrome (977847748779).

The spelling of 865442504211 in words is "eight hundred sixty-five billion, four hundred forty-two million, five hundred four thousand, two hundred eleven".