11661156505014 has 8 divisors (see below), whose sum is σ = 23322313010040. Its totient is φ = 3887052168336.

The previous prime is 11661156504989. The next prime is 11661156505049. The reversal of 11661156505014 is 41050565116611.

It is a sphenic number, since it is the product of 3 distinct primes.

11661156505014 is an admirable number.

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, 971763042079 + ... + 971763042090.

It is an arithmetic number, because the mean of its divisors is an integer number (2915289126255).

Almost surely, 2^{11661156505014} is an apocalyptic number.

11661156505014 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11661156505014 is a wasteful number, since it uses less digits than its factorization.

11661156505014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943526084174.

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 11661156505014 in words is "eleven trillion, six hundred sixty-one billion, one hundred fifty-six million, five hundred five thousand, fourteen".