111751638456013 has 4 divisors (see below), whose sum is σ = 111751982990908. Its totient is φ = 111751293921120.

The previous prime is 111751638455987. The next prime is 111751638456089. The reversal of 111751638456013 is 310654836157111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111074799875209 + 676838580804 = 10539203^2 + 822702^2 .

It is a cyclic number.

It is not a de Polignac number, because 111751638456013 - 2⁵ = 111751638455981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111751638456113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171780456 + ... + 172429777.

It is an arithmetic number, because the mean of its divisors is an integer number (27937995747727).

Almost surely, 2^{111751638456013} is an apocalyptic number.

It is an amenable number.

111751638456013 is a deficient number, since it is larger than the sum of its proper divisors (344534895).

111751638456013 is an equidigital number, since it uses as much as digits as its factorization.

111751638456013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344534894.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 111751638456013 in words is "one hundred eleven trillion, seven hundred fifty-one billion, six hundred thirty-eight million, four hundred fifty-six thousand, thirteen".