11978876610655 has 8 divisors (see below), whose sum is σ = 14394424498272. Its totient is φ = 9569919578208.

The previous prime is 11978876610653. The next prime is 11978876610739. The reversal of 11978876610655 is 55601667887911.

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 11978876610655 - 2¹ = 11978876610653 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 (11978876610653) 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, 1647709792 + ... + 1647717061.

It is an arithmetic number, because the mean of its divisors is an integer number (1799303062284).

Almost surely, 2^{11978876610655} is an apocalyptic number.

11978876610655 is a deficient number, since it is larger than the sum of its proper divisors (2415547887617).

11978876610655 is an equidigital number, since it uses as much as digits as its factorization.

11978876610655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295427585.

The product of its (nonzero) digits is 152409600, while the sum is 70.

The spelling of 11978876610655 in words is "eleven trillion, nine hundred seventy-eight billion, eight hundred seventy-six million, six hundred ten thousand, six hundred fifty-five".