11155428868 has 12 divisors (see below), whose sum is σ = 19574340940. Its totient is φ = 5562760032.

The previous prime is 11155428853. The next prime is 11155428877. The reversal of 11155428868 is 86882455111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5255960004 + 5899468864 = 72498^2 + 76808^2 .

It is a super-2 number, since 2×11155428868² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3736923 + ... + 3739906.

Almost surely, 2^11155428868 is an apocalyptic number.

It is an amenable number.

11155428868 is a deficient number, since it is larger than the sum of its proper divisors (8418912072).

11155428868 is a wasteful number, since it uses less digits than its factorization.

11155428868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477206 (or 7477204 counting only the distinct ones).

The product of its digits is 614400, while the sum is 49.

The spelling of 11155428868 in words is "eleven billion, one hundred fifty-five million, four hundred twenty-eight thousand, eight hundred sixty-eight".