8208215758445 has 32 divisors (see below), whose sum is σ = 10814520301920. Its totient is φ = 5953015111680.

The previous prime is 8208215758441. The next prime is 8208215758571. The reversal of 8208215758445 is 5448575128028.

It can be written as a sum of positive squares in 16 ways, for example, as 837484880164 + 7370730878281 = 915142^2 + 2714909^2 .

It is not a de Polignac number, because 8208215758445 - 2² = 8208215758441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8208215758441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2916992 + ... + 4992521.

It is an arithmetic number, because the mean of its divisors is an integer number (337953759435).

Almost surely, 2^{8208215758445} is an apocalyptic number.

8208215758445 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8208215758445 is a deficient number, since it is larger than the sum of its proper divisors (2606304543475).

8208215758445 is a wasteful number, since it uses less digits than its factorization.

8208215758445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909985.

The product of its (nonzero) digits is 28672000, while the sum is 59.

The spelling of 8208215758445 in words is "eight trillion, two hundred eight billion, two hundred fifteen million, seven hundred fifty-eight thousand, four hundred forty-five".