113551641261 has 16 divisors (see below), whose sum is σ = 170594017920. Its totient is φ = 74634880320.

The previous prime is 113551641221. The next prime is 113551641299. The reversal of 113551641261 is 162146155311.

113551641261 is a `hidden beast` number, since 1 + 1 + 3 + 5 + 5 + 1 + 641 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 113551641261 - 2³⁰ = 112477899437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113551641221) 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 15 ways as a sum of consecutive naturals, for example, 29615100 + ... + 29618933.

It is an arithmetic number, because the mean of its divisors is an integer number (10662126120).

Almost surely, 2^113551641261 is an apocalyptic number.

It is an amenable number.

113551641261 is a deficient number, since it is larger than the sum of its proper divisors (57042376659).

113551641261 is an equidigital number, since it uses as much as digits as its factorization.

113551641261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59234113 (or 59234107 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

Adding to 113551641261 its reverse (162146155311), we get a palindrome (275697796572).

The spelling of 113551641261 in words is "one hundred thirteen billion, five hundred fifty-one million, six hundred forty-one thousand, two hundred sixty-one".