12155511079 has 8 divisors (see below), whose sum is σ = 12808471680. Its totient is φ = 11503870200.

The previous prime is 12155511073. The next prime is 12155511097. The reversal of 12155511079 is 97011555121.

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 12155511079 - 2⁵ = 12155511047 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 (12155511073) 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, 310987 + ... + 347884.

It is an arithmetic number, because the mean of its divisors is an integer number (1601058960).

Almost surely, 2^12155511079 is an apocalyptic number.

12155511079 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12155511079 is a deficient number, since it is larger than the sum of its proper divisors (652960601).

12155511079 is an equidigital number, since it uses as much as digits as its factorization.

12155511079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659861.

The product of its (nonzero) digits is 15750, while the sum is 37.

The spelling of 12155511079 in words is "twelve billion, one hundred fifty-five million, five hundred eleven thousand, seventy-nine".