1155780650 has 12 divisors (see below), whose sum is σ = 2149752102. Its totient is φ = 462312240.

The previous prime is 1155780623. The next prime is 1155780667. The reversal of 1155780650 is 560875511.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1078005889 + 77774761 = 32833^2 + 8819^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11557757 + ... + 11557856.

Almost surely, 2^1155780650 is an apocalyptic number.

1155780650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155780650 is a deficient number, since it is larger than the sum of its proper divisors (993971452).

1155780650 is a wasteful number, since it uses less digits than its factorization.

1155780650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23115625 (or 23115620 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 38.

The square root of 1155780650 is about 33996.7741116712. The cubic root of 1155780650 is about 1049.4420769910.

The spelling of 1155780650 in words is "one billion, one hundred fifty-five million, seven hundred eighty thousand, six hundred fifty".