113147536561 has 4 divisors (see below), whose sum is σ = 113148408832. Its totient is φ = 113146664292.

The previous prime is 113147536511. The next prime is 113147536571. The reversal of 113147536561 is 165635741311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165635741311 = 227719 ⋅727369.

It is a cyclic number.

It is not a de Polignac number, because 113147536561 - 2¹³ = 113147528369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113147536511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198345 + ... + 515398.

It is an arithmetic number, because the mean of its divisors is an integer number (28287102208).

Almost surely, 2^113147536561 is an apocalyptic number.

It is an amenable number.

113147536561 is a deficient number, since it is larger than the sum of its proper divisors (872271).

113147536561 is an equidigital number, since it uses as much as digits as its factorization.

113147536561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872270.

The product of its digits is 226800, while the sum is 43.

The spelling of 113147536561 in words is "one hundred thirteen billion, one hundred forty-seven million, five hundred thirty-six thousand, five hundred sixty-one".