11661578474876 has 12 divisors (see below), whose sum is σ = 22263013452120. Its totient is φ = 5300717488560.

The previous prime is 11661578474839. The next prime is 11661578474951. The reversal of 11661578474876 is 67847487516611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132517937171 + ... + 132517937258.

It is an arithmetic number, because the mean of its divisors is an integer number (1855251121010).

Almost surely, 2^{11661578474876} is an apocalyptic number.

It is an amenable number.

11661578474876 is a deficient number, since it is larger than the sum of its proper divisors (10601434977244).

11661578474876 is a wasteful number, since it uses less digits than its factorization.

11661578474876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265035874444 (or 265035874442 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 71.

The spelling of 11661578474876 in words is "eleven trillion, six hundred sixty-one billion, five hundred seventy-eight million, four hundred seventy-four thousand, eight hundred seventy-six".