845117663 has 16 divisors (see below), whose sum is σ = 960701280. Its totient is φ = 736988544.

The previous prime is 845117639. The next prime is 845117677. The reversal of 845117663 is 366711548.

It is a cyclic number.

It is not a de Polignac number, because 845117663 - 2¹⁰ = 845116639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 845117663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845117683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87545 + ... + 96717.

It is an arithmetic number, because the mean of its divisors is an integer number (60043830).

Almost surely, 2^845117663 is an apocalyptic number.

845117663 is a deficient number, since it is larger than the sum of its proper divisors (115583617).

845117663 is a wasteful number, since it uses less digits than its factorization.

845117663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578.

The product of its digits is 120960, while the sum is 41.

The square root of 845117663 is about 29070.9075021747. The cubic root of 845117663 is about 945.4510740002.

The spelling of 845117663 in words is "eight hundred forty-five million, one hundred seventeen thousand, six hundred sixty-three".