8135859601 has 3 divisors (see below), whose sum is σ = 8135949801. Its totient is φ = 8135769402.

The previous prime is 8135859583. The next prime is 8135859623. The reversal of 8135859601 is 1069585318.

The square root of 8135859601 is 90199.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8135859601 - 2²¹ = 8133762449 is a prime.

It is a super-2 number, since 2×8135859601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8135859631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45100 + ... + 135298.

It is an arithmetic number, because the mean of its divisors is an integer number (2711983267).

Almost surely, 2^8135859601 is an apocalyptic number.

8135859601 is the 90199-th square number.

8135859601 is the 45100-th centered octagonal number.

It is an amenable number.

8135859601 is a deficient number, since it is larger than the sum of its proper divisors (90200).

8135859601 is an frugal number, since it uses more digits than its factorization.

8135859601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180398 (or 90199 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The cubic root of 8135859601 is about 2011.2581416300.

The spelling of 8135859601 in words is "eight billion, one hundred thirty-five million, eight hundred fifty-nine thousand, six hundred one".