113165720405 has 8 divisors (see below), whose sum is σ = 136034221272. Its totient is φ = 90375671808.

The previous prime is 113165720389. The next prime is 113165720483. The reversal of 113165720405 is 504027561311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53648750884 + 59516969521 = 231622^2 + 243961^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 113165720405 - 2⁴ = 113165720389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19609892 + ... + 19615661.

It is an arithmetic number, because the mean of its divisors is an integer number (17004277659).

Almost surely, 2^113165720405 is an apocalyptic number.

It is an amenable number.

113165720405 is a deficient number, since it is larger than the sum of its proper divisors (22868500867).

113165720405 is an equidigital number, since it uses as much as digits as its factorization.

113165720405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39226135.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 113165720405 in words is "one hundred thirteen billion, one hundred sixty-five million, seven hundred twenty thousand, four hundred five".