1128771553 has 16 divisors (see below), whose sum is σ = 1437166080. Its totient is φ = 862295616.

The previous prime is 1128771547. The next prime is 1128771583. The reversal of 1128771553 is 3551778211.

It is not a de Polignac number, because 1128771553 - 2²¹ = 1126674401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128771503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211225 + ... + 216502.

It is an arithmetic number, because the mean of its divisors is an integer number (89822880).

Almost surely, 2^1128771553 is an apocalyptic number.

1128771553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1128771553 is a deficient number, since it is larger than the sum of its proper divisors (308394527).

1128771553 is a wasteful number, since it uses less digits than its factorization.

1128771553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427776.

The product of its digits is 58800, while the sum is 40.

The square root of 1128771553 is about 33597.1956121341. The cubic root of 1128771553 is about 1041.2028590439.

The spelling of 1128771553 in words is "one billion, one hundred twenty-eight million, seven hundred seventy-one thousand, five hundred fifty-three".