1100728551 has 16 divisors (see below), whose sum is σ = 1581148800. Its totient is φ = 677107680.

The previous prime is 1100728537. The next prime is 1100728561. The reversal of 1100728551 is 1558270011.

1100728551 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1100728551 - 2¹⁰ = 1100727527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100728511) 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, 156100 + ... + 162998.

It is an arithmetic number, because the mean of its divisors is an integer number (98821800).

Almost surely, 2^1100728551 is an apocalyptic number.

1100728551 is a deficient number, since it is larger than the sum of its proper divisors (480420249).

1100728551 is a wasteful number, since it uses less digits than its factorization.

1100728551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 1100728551 is about 33177.2294051206. The cubic root of 1100728551 is about 1032.5079647700.

Adding to 1100728551 its reverse (1558270011), we get a palindrome (2658998562).

The spelling of 1100728551 in words is "one billion, one hundred million, seven hundred twenty-eight thousand, five hundred fifty-one".