8237136561 has 8 divisors (see below), whose sum is σ = 11069328384. Its totient is φ = 5448184560.

The previous prime is 8237136559. The next prime is 8237136569. The reversal of 8237136561 is 1656317328.

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

It is not a de Polignac number, because 8237136561 - 2¹ = 8237136559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8237136569) 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, 10809510 + ... + 10810271.

It is an arithmetic number, because the mean of its divisors is an integer number (1383666048).

Almost surely, 2^8237136561 is an apocalyptic number.

It is an amenable number.

8237136561 is a deficient number, since it is larger than the sum of its proper divisors (2832191823).

8237136561 is a wasteful number, since it uses less digits than its factorization.

8237136561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21619911.

The product of its digits is 181440, while the sum is 42.

The square root of 8237136561 is about 90758.6720980425. The cubic root of 8237136561 is about 2019.5692772617.

The spelling of 8237136561 in words is "eight billion, two hundred thirty-seven million, one hundred thirty-six thousand, five hundred sixty-one".