12177780116527 has 4 divisors (see below), whose sum is σ = 12178064773336. Its totient is φ = 12177495459720.

The previous prime is 12177780116503. The next prime is 12177780116563. The reversal of 12177780116527 is 72561108777121.

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-12177780116527 is a prime.

It is a super-3 number, since 3×12177780116527³ (a number of 40 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 (12177780116927) 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, 142264224 + ... + 142349797.

It is an arithmetic number, because the mean of its divisors is an integer number (3044516193334).

Almost surely, 2^{12177780116527} is an apocalyptic number.

12177780116527 is a deficient number, since it is larger than the sum of its proper divisors (284656809).

12177780116527 is an equidigital number, since it uses as much as digits as its factorization.

12177780116527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284656808.

The product of its (nonzero) digits is 2304960, while the sum is 55.

The spelling of 12177780116527 in words is "twelve trillion, one hundred seventy-seven billion, seven hundred eighty million, one hundred sixteen thousand, five hundred twenty-seven".