864417841506 has 24 divisors (see below), whose sum is σ = 1883731372380. Its totient is φ = 286473734496.

The previous prime is 864417841501. The next prime is 864417841537. The reversal of 864417841506 is 605148714468.

864417841506 is a `hidden beast` number, since 8 + 6 + 44 + 17 + 84 + 1 + 506 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 745734146481 + 118683695025 = 863559^2 + 344505^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864417841501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138792301 + ... + 138798528.

Almost surely, 2^864417841506 is an apocalyptic number.

864417841506 is an abundant number, since it is smaller than the sum of its proper divisors (1019313530874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864417841506 is a wasteful number, since it uses less digits than its factorization.

864417841506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277591010 (or 277591007 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 864417841506 in words is "eight hundred sixty-four billion, four hundred seventeen million, eight hundred forty-one thousand, five hundred six".