11681509954432 has 32 divisors (see below), whose sum is σ = 23369129546400. Its totient is φ = 5816316656640.

The previous prime is 11681509954423. The next prime is 11681509954451. The reversal of 11681509954432 is 23445990518611.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190893669 + ... + 190954852.

It is an arithmetic number, because the mean of its divisors is an integer number (730285298325).

Almost surely, 2^{11681509954432} is an apocalyptic number.

It is an amenable number.

11681509954432 is an abundant number, since it is smaller than the sum of its proper divisors (11687619591968).

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

11681509954432 is an equidigital number, since it uses as much as digits as its factorization.

11681509954432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381848774 (or 381848762 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 11681509954432 in words is "eleven trillion, six hundred eighty-one billion, five hundred nine million, nine hundred fifty-four thousand, four hundred thirty-two".