111638799326209 has 8 divisors (see below), whose sum is σ = 111905756396840. Its totient is φ = 111372150700800.

The previous prime is 111638799326207. The next prime is 111638799326261. The reversal of 111638799326209 is 902623997836111.

It can be written as a sum of positive squares in 4 ways, for example, as 10336687965184 + 101302111361025 = 3215072^2 + 10064895^2 .

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 111638799326209 - 2¹ = 111638799326207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111638799326207) 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, 76386552 + ... + 77834329.

It is an arithmetic number, because the mean of its divisors is an integer number (13988219549605).

Almost surely, 2^{111638799326209} is an apocalyptic number.

It is an amenable number.

111638799326209 is a deficient number, since it is larger than the sum of its proper divisors (266957070631).

111638799326209 is a wasteful number, since it uses less digits than its factorization.

111638799326209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154222611.

The product of its (nonzero) digits is 52907904, while the sum is 67.

The spelling of 111638799326209 in words is "one hundred eleven trillion, six hundred thirty-eight billion, seven hundred ninety-nine million, three hundred twenty-six thousand, two hundred nine".