11161421406 has 120 divisors (see below), whose sum is σ = 26170368840. Its totient is φ = 3554394048.

The previous prime is 11161421363. The next prime is 11161421419. The reversal of 11161421406 is 60412416111.

11161421406 is a `hidden beast` number, since 1 + 1 + 1 + 614 + 2 + 1 + 40 + 6 = 666.

11161421406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11161421406.

It is a congruent number.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 13084476 + ... + 13085328.

It is an arithmetic number, because the mean of its divisors is an integer number (218086407).

Almost surely, 2^11161421406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11161421406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13085184420).

11161421406 is an abundant number, since it is smaller than the sum of its proper divisors (15008947434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11161421406 is an equidigital number, since it uses as much as digits as its factorization.

11161421406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

Adding to 11161421406 its reverse (60412416111), we get a palindrome (71573837517).

The spelling of 11161421406 in words is "eleven billion, one hundred sixty-one million, four hundred twenty-one thousand, four hundred six".