981135423545 has 8 divisors (see below), whose sum is σ = 1177711583496. Its totient is φ = 784675622016.

The previous prime is 981135423529. The next prime is 981135423571. The reversal of 981135423545 is 545324531189.

It can be written as a sum of positive squares in 4 ways, for example, as 687645611536 + 293489812009 = 829244^2 + 541747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981135423545 - 2⁴ = 981135423529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 981135423493 and 981135423502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29071052 + ... + 29104781.

It is an arithmetic number, because the mean of its divisors is an integer number (147213947937).

Almost surely, 2^981135423545 is an apocalyptic number.

It is an amenable number.

981135423545 is a deficient number, since it is larger than the sum of its proper divisors (196576159951).

981135423545 is a wasteful number, since it uses less digits than its factorization.

981135423545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58179211.

The product of its digits is 2592000, while the sum is 50.

The spelling of 981135423545 in words is "nine hundred eighty-one billion, one hundred thirty-five million, four hundred twenty-three thousand, five hundred forty-five".