1155512080 has 20 divisors (see below), whose sum is σ = 2686565772. Its totient is φ = 462204800.

The previous prime is 1155512077. The next prime is 1155512089. The reversal of 1155512080 is 802155511.

It can be written as a sum of positive squares in 2 ways, for example, as 173817856 + 981694224 = 13184^2 + 31332^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1155512089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7221871 + ... + 7222030.

Almost surely, 2^1155512080 is an apocalyptic number.

1155512080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155512080 is an abundant number, since it is smaller than the sum of its proper divisors (1531053692).

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

1155512080 is a wasteful number, since it uses less digits than its factorization.

1155512080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14443914 (or 14443908 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 28.

The square root of 1155512080 is about 33992.8239485924. The cubic root of 1155512080 is about 1049.3607840304.

Adding to 1155512080 its reverse (802155511), we get a palindrome (1957667591).

The spelling of 1155512080 in words is "one billion, one hundred fifty-five million, five hundred twelve thousand, eighty".