111444479137 has 4 divisors (see below), whose sum is σ = 111800532100. Its totient is φ = 111088426176.

The previous prime is 111444479131. The next prime is 111444479161. The reversal of 111444479137 is 731974444111.

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 1249693201 + 110194785936 = 35351^2 + 331956^2 .

It is a cyclic number.

It is not a de Polignac number, because 111444479137 - 2³ = 111444479129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111444479131) 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, 178026012 + ... + 178026637.

It is an arithmetic number, because the mean of its divisors is an integer number (27950133025).

Almost surely, 2^111444479137 is an apocalyptic number.

It is an amenable number.

111444479137 is a deficient number, since it is larger than the sum of its proper divisors (356052963).

111444479137 is an equidigital number, since it uses as much as digits as its factorization.

111444479137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356052962.

The product of its digits is 338688, while the sum is 46.

The spelling of 111444479137 in words is "one hundred eleven billion, four hundred forty-four million, four hundred seventy-nine thousand, one hundred thirty-seven".