11661515104 has 24 divisors (see below), whose sum is σ = 22988357280. Its totient is φ = 5823202176.

The previous prime is 11661515087. The next prime is 11661515113. The reversal of 11661515104 is 40151516611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210984 + ... + 260455.

It is an arithmetic number, because the mean of its divisors is an integer number (957848220).

Almost surely, 2^11661515104 is an apocalyptic number.

It is an amenable number.

11661515104 is a deficient number, since it is larger than the sum of its proper divisors (11326842176).

11661515104 is an equidigital number, since it uses as much as digits as its factorization.

11661515104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472222 (or 472214 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 31.

The spelling of 11661515104 in words is "eleven billion, six hundred sixty-one million, five hundred fifteen thousand, one hundred four".