11719408005621 has 12 divisors (see below), whose sum is σ = 16929966103180. Its totient is φ = 7812046831680.

The previous prime is 11719408005533. The next prime is 11719408005637. The reversal of 11719408005621 is 12650080491711.

11719408005621 is a `hidden beast` number, since 1 + 1 + 7 + 1 + 9 + 4 + 0 + 80 + 0 + 562 + 1 = 666.

11719408005621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1268664322500 + 10450743683121 = 1126350^2 + 3232761^2 .

It is not a de Polignac number, because 11719408005621 - 2²⁹ = 11718871134709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11719408005671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74236666 + ... + 74394363.

Almost surely, 2^{11719408005621} is an apocalyptic number.

It is an amenable number.

11719408005621 is a deficient number, since it is larger than the sum of its proper divisors (5210558097559).

11719408005621 is a wasteful number, since it uses less digits than its factorization.

11719408005621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148639796 (or 148639793 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 11719408005621 in words is "eleven trillion, seven hundred nineteen billion, four hundred eight million, five thousand, six hundred twenty-one".