1155005512 has 8 divisors (see below), whose sum is σ = 2165635350. Its totient is φ = 577502752.

The previous prime is 1155005479. The next prime is 1155005519. The reversal of 1155005512 is 2155005511.

It can be written as a sum of positive squares in only one way, i.e., 868245156 + 286760356 = 29466^2 + 16934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1155005519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72187837 + ... + 72187852.

Almost surely, 2^1155005512 is an apocalyptic number.

It is an amenable number.

1155005512 is a deficient number, since it is larger than the sum of its proper divisors (1010629838).

1155005512 is a wasteful number, since it uses less digits than its factorization.

1155005512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144375695 (or 144375691 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 1155005512 is about 33985.3720297424. The cubic root of 1155005512 is about 1049.2074175992.

Subtracting 1155005512 from its reverse (2155005511), we obtain a palindrome (999999999).

The spelling of 1155005512 in words is "one billion, one hundred fifty-five million, five thousand, five hundred twelve".