11856147806 has 16 divisors (see below), whose sum is σ = 18280143504. Its totient is φ = 5764746624.

The previous prime is 11856147731. The next prime is 11856147827. The reversal of 11856147806 is 60874165811.

It is a happy number.

It is a super-2 number, since 2×11856147806² (a number of 21 digits) contains 22 as substring.

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, 482936 + ... + 506891.

It is an arithmetic number, because the mean of its divisors is an integer number (1142508969).

Almost surely, 2^11856147806 is an apocalyptic number.

11856147806 is a deficient number, since it is larger than the sum of its proper divisors (6423995698).

11856147806 is a wasteful number, since it uses less digits than its factorization.

11856147806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989995.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 11856147806 in words is "eleven billion, eight hundred fifty-six million, one hundred forty-seven thousand, eight hundred six".