7986427663105 has 4 divisors (see below), whose sum is σ = 9583713195732. Its totient is φ = 6389142130480.

The previous prime is 7986427663103. The next prime is 7986427663127. The reversal of 7986427663105 is 5013667246897.

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 4549215486321 + 3437212176784 = 2132889^2 + 1853972^2 .

It is not a de Polignac number, because 7986427663105 - 2¹ = 7986427663103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7986427663103) 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, 798642766306 + ... + 798642766315.

It is an arithmetic number, because the mean of its divisors is an integer number (2395928298933).

It is a 1-persistent number, because it is pandigital, but 2⋅7986427663105 = 15972855326210 is not.

Almost surely, 2^{7986427663105} is an apocalyptic number.

It is an amenable number.

7986427663105 is a deficient number, since it is larger than the sum of its proper divisors (1597285532627).

7986427663105 is a wasteful number, since it uses less digits than its factorization.

7986427663105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597285532626.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 7986427663105 in words is "seven trillion, nine hundred eighty-six billion, four hundred twenty-seven million, six hundred sixty-three thousand, one hundred five".