11111280679 has 4 divisors (see below), whose sum is σ = 11469709120. Its totient is φ = 10752852240.

The previous prime is 11111280641. The next prime is 11111280689. The reversal of 11111280679 is 97608211111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111280679 is a prime.

It is a super-3 number, since 3×11111280679³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111280689) 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, 179214174 + ... + 179214235.

It is an arithmetic number, because the mean of its divisors is an integer number (2867427280).

Almost surely, 2^11111280679 is an apocalyptic number.

11111280679 is a deficient number, since it is larger than the sum of its proper divisors (358428441).

11111280679 is an equidigital number, since it uses as much as digits as its factorization.

11111280679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358428440.

The product of its (nonzero) digits is 6048, while the sum is 37.

The spelling of 11111280679 in words is "eleven billion, one hundred eleven million, two hundred eighty thousand, six hundred seventy-nine".