11794387811621 has 2 divisors, whose sum is σ = 11794387811622. Its totient is φ = 11794387811620.

The previous prime is 11794387811599. The next prime is 11794387811651. The reversal of 11794387811621 is 12611878349711.

11794387811621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10127606112100 + 1666781699521 = 3182390^2 + 1291039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11794387811621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11794387811651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5897193905810 + 5897193905811.

It is an arithmetic number, because the mean of its divisors is an integer number (5897193905811).

Almost surely, 2^{11794387811621} is an apocalyptic number.

It is an amenable number.

11794387811621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11794387811621 is an equidigital number, since it uses as much as digits as its factorization.

11794387811621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 59.

The spelling of 11794387811621 in words is "eleven trillion, seven hundred ninety-four billion, three hundred eighty-seven million, eight hundred eleven thousand, six hundred twenty-one".