111234567779 has 4 divisors (see below), whose sum is σ = 115070242560. Its totient is φ = 107398893000.

The previous prime is 111234567767. The next prime is 111234567791. The reversal of 111234567779 is 977765432111.

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

It is an interprime number because it is at equal distance from previous prime (111234567767) and next prime (111234567791).

It is a cyclic number.

It is not a de Polignac number, because 111234567779 - 2⁸ = 111234567523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 111234567779.

It is not an unprimeable number, because it can be changed into a prime (111234567709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1917837347 + ... + 1917837404.

It is an arithmetic number, because the mean of its divisors is an integer number (28767560640).

Almost surely, 2^111234567779 is an apocalyptic number.

111234567779 is a deficient number, since it is larger than the sum of its proper divisors (3835674781).

111234567779 is an equidigital number, since it uses as much as digits as its factorization.

111234567779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835674780.

The product of its digits is 2222640, while the sum is 53.

The spelling of 111234567779 in words is "one hundred eleven billion, two hundred thirty-four million, five hundred sixty-seven thousand, seven hundred seventy-nine".