11506205406 has 16 divisors (see below), whose sum is σ = 23018374800. Its totient is φ = 3834407808.

The previous prime is 11506205393. The next prime is 11506205413. The reversal of 11506205406 is 60450260511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223221 + ... + 269888.

It is an arithmetic number, because the mean of its divisors is an integer number (1438648425).

Almost surely, 2^11506205406 is an apocalyptic number.

11506205406 is an abundant number, since it is smaller than the sum of its proper divisors (11512169394).

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

11506205406 is a wasteful number, since it uses less digits than its factorization.

11506205406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497003.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 11506205406 its reverse (60450260511), we get a palindrome (71956465917).

The spelling of 11506205406 in words is "eleven billion, five hundred six million, two hundred five thousand, four hundred six".