11978172821453 has 8 divisors (see below), whose sum is σ = 12187070452800. Its totient is φ = 11770926555168.

The previous prime is 11978172821441. The next prime is 11978172821467. The reversal of 11978172821453 is 35412827187911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11978172821453 - 2⁴⁰ = 10878661193677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11978172821392 and 11978172821401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978172821473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412826633 + ... + 412855646.

It is an arithmetic number, because the mean of its divisors is an integer number (1523383806600).

Almost surely, 2^{11978172821453} is an apocalyptic number.

It is an amenable number.

11978172821453 is a deficient number, since it is larger than the sum of its proper divisors (208897631347).

11978172821453 is an equidigital number, since it uses as much as digits as its factorization.

11978172821453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825682531.

The product of its digits is 6773760, while the sum is 59.

The spelling of 11978172821453 in words is "eleven trillion, nine hundred seventy-eight billion, one hundred seventy-two million, eight hundred twenty-one thousand, four hundred fifty-three".