8212486445 has 4 divisors (see below), whose sum is σ = 9854983740. Its totient is φ = 6569989152.

The previous prime is 8212486409. The next prime is 8212486493. The reversal of 8212486445 is 5446842128.

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 1286585161 + 6925901284 = 35869^2 + 83222^2 .

It is a cyclic number.

It is not a de Polignac number, because 8212486445 - 2⁸ = 8212486189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8212486396 and 8212486405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821248640 + ... + 821248649.

It is an arithmetic number, because the mean of its divisors is an integer number (2463745935).

Almost surely, 2^8212486445 is an apocalyptic number.

It is an amenable number.

8212486445 is a deficient number, since it is larger than the sum of its proper divisors (1642497295).

8212486445 is a wasteful number, since it uses less digits than its factorization.

8212486445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642497294.

The product of its digits is 491520, while the sum is 44.

The square root of 8212486445 is about 90622.7700139430. The cubic root of 8212486445 is about 2017.5527043727.

The spelling of 8212486445 in words is "eight billion, two hundred twelve million, four hundred eighty-six thousand, four hundred forty-five".