981158395217 has 32 divisors (see below), whose sum is σ = 1335913979904. Its totient is φ = 695788430400.

The previous prime is 981158395201. The next prime is 981158395237. The reversal of 981158395217 is 712593851189.

It is not a de Polignac number, because 981158395217 - 2⁴ = 981158395201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981158395237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6831593 + ... + 6973734.

It is an arithmetic number, because the mean of its divisors is an integer number (41747311872).

Almost surely, 2^981158395217 is an apocalyptic number.

It is an amenable number.

981158395217 is a deficient number, since it is larger than the sum of its proper divisors (354755584687).

981158395217 is a wasteful number, since it uses less digits than its factorization.

981158395217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805429.

The product of its digits is 5443200, while the sum is 59.

The spelling of 981158395217 in words is "nine hundred eighty-one billion, one hundred fifty-eight million, three hundred ninety-five thousand, two hundred seventeen".