11826780001 has 3 divisors (see below), whose sum is σ = 11826888753. Its totient is φ = 11826671250.

The previous prime is 11826779989. The next prime is 11826780019. The reversal of 11826780001 is 10008762811.

The square root of 11826780001 is 108751.

It is a perfect power (a square), and thus also a powerful number.

11826780001 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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11826780001 - 2⁵ = 11826779969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11826780061) 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 2 ways as a sum of consecutive naturals, for example, 54376 + ... + 163126.

It is an arithmetic number, because the mean of its divisors is an integer number (3942296251).

Almost surely, 2^11826780001 is an apocalyptic number.

11826780001 is the 108751-st square number.

11826780001 is the 54376-th centered octagonal number.

It is an amenable number.

11826780001 is a deficient number, since it is larger than the sum of its proper divisors (108752).

11826780001 is an frugal number, since it uses more digits than its factorization.

11826780001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217502 (or 108751 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

The spelling of 11826780001 in words is "eleven billion, eight hundred twenty-six million, seven hundred eighty thousand, one".