8218861445 has 8 divisors (see below), whose sum is σ = 10381719840. Its totient is φ = 6229031760.

The previous prime is 8218861367. The next prime is 8218861457. The reversal of 8218861445 is 5441688128.

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 8218861445 - 2¹⁶ = 8218795909 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8218861445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43257071 + ... + 43257260.

It is an arithmetic number, because the mean of its divisors is an integer number (1297714980).

Almost surely, 2^8218861445 is an apocalyptic number.

It is an amenable number.

8218861445 is a deficient number, since it is larger than the sum of its proper divisors (2162858395).

8218861445 is a wasteful number, since it uses less digits than its factorization.

8218861445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86514355.

The product of its digits is 491520, while the sum is 47.

The square root of 8218861445 is about 90657.9364700080. The cubic root of 8218861445 is about 2018.0746158126.

The spelling of 8218861445 in words is "eight billion, two hundred eighteen million, eight hundred sixty-one thousand, four hundred forty-five".