11171621016720 has 120 divisors (see below), whose sum is σ = 38907583880256. Its totient is φ = 2979098932608.

The previous prime is 11171621016713. The next prime is 11171621016737. The reversal of 11171621016720 is 2761012617111.

11171621016720 is a `hidden beast` number, since 1 + 1 + 1 + 7 + 1 + 621 + 0 + 1 + 6 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×11171621016720² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287316492 + ... + 287355371.

Almost surely, 2^{11171621016720} is an apocalyptic number.

11171621016720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11171621016720 is an abundant number, since it is smaller than the sum of its proper divisors (27735962863536).

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

11171621016720 is an equidigital number, since it uses as much as digits as its factorization.

11171621016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574671891 (or 574671873 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The spelling of 11171621016720 in words is "eleven trillion, one hundred seventy-one billion, six hundred twenty-one million, sixteen thousand, seven hundred twenty".