11156643853919 has 16 divisors (see below), whose sum is σ = 11407464921600. Its totient is φ = 10908038009184.

The previous prime is 11156643853903. The next prime is 11156643853931. The reversal of 11156643853919 is 91935834665111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11156643853919 - 2⁴ = 11156643853903 is a prime.

It is a super-2 number, since 2×11156643853919² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156643883919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7531214 + ... + 8890020.

It is an arithmetic number, because the mean of its divisors is an integer number (712966557600).

Almost surely, 2^{11156643853919} is an apocalyptic number.

11156643853919 is a deficient number, since it is larger than the sum of its proper divisors (250821067681).

11156643853919 is a wasteful number, since it uses less digits than its factorization.

11156643853919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359622.

The product of its digits is 20995200, while the sum is 62.

The spelling of 11156643853919 in words is "eleven trillion, one hundred fifty-six billion, six hundred forty-three million, eight hundred fifty-three thousand, nine hundred nineteen".