8138395075969 has 8 divisors (see below), whose sum is σ = 8274134154600. Its totient is φ = 8003737584000.

The previous prime is 8138395075919. The next prime is 8138395075973. The reversal of 8138395075969 is 9695705938318.

It can be written as a sum of positive squares in 4 ways, for example, as 2562128442225 + 5576266633744 = 1600665^2 + 2361412^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8138395075969 - 2²¹ = 8138392978817 is a prime.

It is a super-2 number, since 2×8138395075969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8138395075919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270381492 + ... + 270411589.

It is an arithmetic number, because the mean of its divisors is an integer number (1034266769325).

Almost surely, 2^{8138395075969} is an apocalyptic number.

It is an amenable number.

8138395075969 is a deficient number, since it is larger than the sum of its proper divisors (135739078631).

8138395075969 is a wasteful number, since it uses less digits than its factorization.

8138395075969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540793331.

The product of its (nonzero) digits is 440899200, while the sum is 73.

The spelling of 8138395075969 in words is "eight trillion, one hundred thirty-eight billion, three hundred ninety-five million, seventy-five thousand, nine hundred sixty-nine".