8117523513 has 32 divisors (see below), whose sum is σ = 13366788480. Its totient is φ = 4826877120.

The previous prime is 8117523497. The next prime is 8117523517. The reversal of 8117523513 is 3153257118.

It is a happy number.

8117523513 is a `hidden beast` number, since 8 + 117 + 5 + 23 + 513 = 666.

It is not a de Polignac number, because 8117523513 - 2⁴ = 8117523497 is a prime.

It is a super-2 number, since 2×8117523513² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8117523517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242106 + ... + 273587.

It is an arithmetic number, because the mean of its divisors is an integer number (417712140).

Almost surely, 2^8117523513 is an apocalyptic number.

It is an amenable number.

8117523513 is a deficient number, since it is larger than the sum of its proper divisors (5249264967).

8117523513 is a wasteful number, since it uses less digits than its factorization.

8117523513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515766 (or 515760 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 8117523513 is about 90097.3002536702. The cubic root of 8117523513 is about 2009.7460561337.

The spelling of 8117523513 in words is "eight billion, one hundred seventeen million, five hundred twenty-three thousand, five hundred thirteen".