1155275776 has 44 divisors (see below), whose sum is σ = 2338820320. Its totient is φ = 570286080.

The previous prime is 1155275741. The next prime is 1155275857. The reversal of 1155275776 is 6775725511.

It is a super-3 number, since 3×1155275776³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 73756 + ... + 88036.

Almost surely, 2^1155275776 is an apocalyptic number.

1155275776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155275776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169410160).

1155275776 is an abundant number, since it is smaller than the sum of its proper divisors (1183544544).

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

1155275776 is an equidigital number, since it uses as much as digits as its factorization.

1155275776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380 (or 14362 counting only the distinct ones).

The product of its digits is 514500, while the sum is 46.

The square root of 1155275776 is about 33989.3479784476. The cubic root of 1155275776 is about 1049.2892471882.

The spelling of 1155275776 in words is "one billion, one hundred fifty-five million, two hundred seventy-five thousand, seven hundred seventy-six".