8426671654129 has 3 divisors (see below), whose sum is σ = 8426674557003. Its totient is φ = 8426668751256.

The previous prime is 8426671654127. The next prime is 8426671654133. The reversal of 8426671654129 is 9214561766248.

The square root of 8426671654129 is 2902873.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1188677770225 + 7237993883904 = 1090265^2 + 2690352^2 .

It is not a de Polignac number, because 8426671654129 - 2¹ = 8426671654127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8426671654127) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1451437 + ... + 4354309.

It is an arithmetic number, because the mean of its divisors is an integer number (2808891519001).

Almost surely, 2^{8426671654129} is an apocalyptic number.

8426671654129 is the 2902873-rd square number.

8426671654129 is the 1451437-th centered octagonal number.

It is an amenable number.

8426671654129 is a deficient number, since it is larger than the sum of its proper divisors (2902874).

8426671654129 is an frugal number, since it uses more digits than its factorization.

8426671654129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805746 (or 2902873 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 61.

The spelling of 8426671654129 in words is "eight trillion, four hundred twenty-six billion, six hundred seventy-one million, six hundred fifty-four thousand, one hundred twenty-nine".