11128291556 has 6 divisors (see below), whose sum is σ = 19474510230. Its totient is φ = 5564145776.

The previous prime is 11128291553. The next prime is 11128291591. The reversal of 11128291556 is 65519282111.

It can be written as a sum of positive squares in only one way, i.e., 10127201956 + 1001089600 = 100634^2 + 31640^2 .

It is a super-2 number, since 2×11128291556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11128291553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391036441 + ... + 1391036448.

It is an arithmetic number, because the mean of its divisors is an integer number (3245751705).

Almost surely, 2^11128291556 is an apocalyptic number.

It is an amenable number.

11128291556 is a deficient number, since it is larger than the sum of its proper divisors (8346218674).

11128291556 is a wasteful number, since it uses less digits than its factorization.

11128291556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782072893 (or 2782072891 counting only the distinct ones).

The product of its digits is 43200, while the sum is 41.

The spelling of 11128291556 in words is "eleven billion, one hundred twenty-eight million, two hundred ninety-one thousand, five hundred fifty-six".