1185645680 has 20 divisors (see below), whose sum is σ = 2756626392. Its totient is φ = 474258240.

The previous prime is 1185645677. The next prime is 1185645689. The reversal of 1185645680 is 865465811.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185645689) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7410206 + ... + 7410365.

Almost surely, 2^1185645680 is an apocalyptic number.

1185645680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1185645680 is an abundant number, since it is smaller than the sum of its proper divisors (1570980712).

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

1185645680 is a wasteful number, since it uses less digits than its factorization.

1185645680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14820584 (or 14820578 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 1185645680 is about 34433.2060662379. The cubic root of 1185645680 is about 1058.4044108476.

The spelling of 1185645680 in words is "one billion, one hundred eighty-five million, six hundred forty-five thousand, six hundred eighty".