11057156217 has 24 divisors (see below), whose sum is σ = 16669722888. Its totient is φ = 7055942400.

The previous prime is 11057156213. The next prime is 11057156233. The reversal of 11057156217 is 71265175011.

It is a happy number.

11057156217 is a `hidden beast` number, since 1 + 10 + 5 + 7 + 15 + 621 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 112021056 + 10945135161 = 10584^2 + 104619^2 .

It is not a de Polignac number, because 11057156217 - 2² = 11057156213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11057156213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263134 + ... + 302247.

It is an arithmetic number, because the mean of its divisors is an integer number (694571787).

Almost surely, 2^11057156217 is an apocalyptic number.

It is an amenable number.

11057156217 is a deficient number, since it is larger than the sum of its proper divisors (5612566671).

11057156217 is a wasteful number, since it uses less digits than its factorization.

11057156217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565481 (or 565478 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 11057156217 in words is "eleven billion, fifty-seven million, one hundred fifty-six thousand, two hundred seventeen".