867543216401 has 4 divisors (see below), whose sum is σ = 881765236404. Its totient is φ = 853321196400.

The previous prime is 867543216373. The next prime is 867543216437. The reversal of 867543216401 is 104612345768.

It is a Cunningham number, because it is equal to 931420²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28210561600 + 839332654801 = 167960^2 + 916151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867543216401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (867543216101) 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, 7111009910 + ... + 7111010031.

It is an arithmetic number, because the mean of its divisors is an integer number (220441309101).

Almost surely, 2^867543216401 is an apocalyptic number.

It is an amenable number.

867543216401 is a deficient number, since it is larger than the sum of its proper divisors (14222020003).

867543216401 is a wasteful number, since it uses less digits than its factorization.

867543216401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14222020002.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 867543216401 in words is "eight hundred sixty-seven billion, five hundred forty-three million, two hundred sixteen thousand, four hundred one".