1155441881 has 16 divisors (see below), whose sum is σ = 1268752128. Its totient is φ = 1043539200.

The previous prime is 1155441857. The next prime is 1155441943. The reversal of 1155441881 is 1881445511.

It is not a de Polignac number, because 1155441881 - 2²² = 1151247577 is a prime.

It is a super-2 number, since 2×1155441881² = 2670091880737636322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155441811) 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, 1747691 + ... + 1748351.

It is an arithmetic number, because the mean of its divisors is an integer number (79297008).

Almost surely, 2^1155441881 is an apocalyptic number.

1155441881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155441881 is a deficient number, since it is larger than the sum of its proper divisors (113310247).

1155441881 is a wasteful number, since it uses less digits than its factorization.

1155441881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472.

The product of its digits is 25600, while the sum is 38.

The square root of 1155441881 is about 33991.7913767427. The cubic root of 1155441881 is about 1049.3395335474.

It can be divided in two parts, 11554 and 41881, that added together give a palindrome (53435).

The spelling of 1155441881 in words is "one billion, one hundred fifty-five million, four hundred forty-one thousand, eight hundred eighty-one".