817961117153 has 8 divisors (see below), whose sum is σ = 821901595680. Its totient is φ = 814023596320.

The previous prime is 817961117143. The next prime is 817961117287. The reversal of 817961117153 is 351711169718.

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 817961117153 - 2⁴ = 817961117137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (817961117143) by changing a digit.

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, 183983 + ... + 1292196.

It is an arithmetic number, because the mean of its divisors is an integer number (102737699460).

Almost surely, 2^817961117153 is an apocalyptic number.

It is an amenable number.

817961117153 is a deficient number, since it is larger than the sum of its proper divisors (3940478527).

817961117153 is a wasteful number, since it uses less digits than its factorization.

817961117153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478847.

The product of its digits is 317520, while the sum is 50.

The spelling of 817961117153 in words is "eight hundred seventeen billion, nine hundred sixty-one million, one hundred seventeen thousand, one hundred fifty-three".