11712663078978 has 32 divisors (see below), whose sum is σ = 24296645534400. Its totient is φ = 3761090625600.

The previous prime is 11712663078917. The next prime is 11712663078983. The reversal of 11712663078978 is 87987036621711.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261164428 + ... + 261209271.

It is an arithmetic number, because the mean of its divisors is an integer number (759270172950).

Almost surely, 2^{11712663078978} is an apocalyptic number.

11712663078978 is an abundant number, since it is smaller than the sum of its proper divisors (12583982455422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11712663078978 is a wasteful number, since it uses less digits than its factorization.

11712663078978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522373842.

The product of its (nonzero) digits is 42674688, while the sum is 66.

The spelling of 11712663078978 in words is "eleven trillion, seven hundred twelve billion, six hundred sixty-three million, seventy-eight thousand, nine hundred seventy-eight".