1101303505728 has 84 divisors (see below), whose sum is σ = 3161257084128. Its totient is φ = 366569775360.

The previous prime is 1101303505721. The next prime is 1101303505741. The reversal of 1101303505728 is 8275053031011.

It is a happy number.

1101303505728 is a `hidden beast` number, since 1 + 1 + 0 + 1 + 30 + 3 + 50 + 572 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1101303505692 and 1101303505701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101303505721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 985476 + ... + 1781507.

Almost surely, 2^{1101303505728} is an apocalyptic number.

1101303505728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1101303505728 is an abundant number, since it is smaller than the sum of its proper divisors (2059953578400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1101303505728 is a wasteful number, since it uses less digits than its factorization.

1101303505728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767692 (or 2767679 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 1101303505728 its reverse (8275053031011), we get a palindrome (9376356536739).

The spelling of 1101303505728 in words is "one trillion, one hundred one billion, three hundred three million, five hundred five thousand, seven hundred twenty-eight".