981289064145 has 64 divisors (see below), whose sum is σ = 1728421954560. Its totient is φ = 472461251328.

The previous prime is 981289064141. The next prime is 981289064167. The reversal of 981289064145 is 541460982189.

It is not a de Polignac number, because 981289064145 - 2² = 981289064141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981289064141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1545862 + ... + 2086208.

It is an arithmetic number, because the mean of its divisors is an integer number (27006593040).

Almost surely, 2^981289064145 is an apocalyptic number.

It is an amenable number.

981289064145 is a deficient number, since it is larger than the sum of its proper divisors (747132890415).

981289064145 is a wasteful number, since it uses less digits than its factorization.

981289064145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540574.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 981289064145 in words is "nine hundred eighty-one billion, two hundred eighty-nine million, sixty-four thousand, one hundred forty-five".