12091616401 has 4 divisors (see below), whose sum is σ = 12802887972. Its totient is φ = 11380344832.

The previous prime is 12091616399. The next prime is 12091616437. The reversal of 12091616401 is 10461619021.

12091616401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10961043025 + 1130573376 = 104695^2 + 33624^2 .

It is a cyclic number.

It is not a de Polignac number, because 12091616401 - 2¹ = 12091616399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12091616441) by changing a digit.

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, 355635760 + ... + 355635793.

It is an arithmetic number, because the mean of its divisors is an integer number (3200721993).

Almost surely, 2^12091616401 is an apocalyptic number.

It is an amenable number.

12091616401 is a deficient number, since it is larger than the sum of its proper divisors (711271571).

12091616401 is an equidigital number, since it uses as much as digits as its factorization.

12091616401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711271570.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 12091616401 in words is "twelve billion, ninety-one million, six hundred sixteen thousand, four hundred one".