671815422459 has 12 divisors (see below), whose sum is σ = 972193777152. Its totient is φ = 447049076400.

The previous prime is 671815422457. The next prime is 671815422463. The reversal of 671815422459 is 954224518176.

671815422459 is a `hidden beast` number, since 6 + 7 + 18 + 154 + 22 + 459 = 666.

It is not a de Polignac number, because 671815422459 - 2¹ = 671815422457 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (671815422457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68984187 + ... + 68993924.

It is an arithmetic number, because the mean of its divisors is an integer number (81016148096).

Almost surely, 2^671815422459 is an apocalyptic number.

671815422459 is a deficient number, since it is larger than the sum of its proper divisors (300378354693).

671815422459 is a wasteful number, since it uses less digits than its factorization.

671815422459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137978658 (or 137978655 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 671815422459 in words is "six hundred seventy-one billion, eight hundred fifteen million, four hundred twenty-two thousand, four hundred fifty-nine".