8190447759649 has 4 divisors (see below), whose sum is σ = 8191431133060. Its totient is φ = 8189464386240.

The previous prime is 8190447759623. The next prime is 8190447759691. The reversal of 8190447759649 is 9469577440918.

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 5124247142400 + 3066200617249 = 2263680^2 + 1751057^2 .

It is a cyclic number.

It is not a de Polignac number, because 8190447759649 - 2¹⁹ = 8190447235361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8190447751649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491674212 + ... + 491690869.

It is an arithmetic number, because the mean of its divisors is an integer number (2047857783265).

Almost surely, 2^{8190447759649} is an apocalyptic number.

It is an amenable number.

8190447759649 is a deficient number, since it is larger than the sum of its proper divisors (983373411).

8190447759649 is an equidigital number, since it uses as much as digits as its factorization.

8190447759649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983373410.

The product of its (nonzero) digits is 548674560, while the sum is 73.

The spelling of 8190447759649 in words is "eight trillion, one hundred ninety billion, four hundred forty-seven million, seven hundred fifty-nine thousand, six hundred forty-nine".