868808487645 has 32 divisors (see below), whose sum is σ = 1765198199040. Its totient is φ = 397169593920.

The previous prime is 868808487629. The next prime is 868808487733. The reversal of 868808487645 is 546784808868.

868808487645 is a `hidden beast` number, since 8 + 6 + 8 + 80 + 8 + 487 + 64 + 5 = 666.

It is not a de Polignac number, because 868808487645 - 2⁴ = 868808487629 is a prime.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 459686086 + ... + 459687975.

It is an arithmetic number, because the mean of its divisors is an integer number (55162443720).

Almost surely, 2^868808487645 is an apocalyptic number.

It is an amenable number.

868808487645 is an abundant number, since it is smaller than the sum of its proper divisors (896389711395).

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

868808487645 is a wasteful number, since it uses less digits than its factorization.

868808487645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919374082 (or 919374076 counting only the distinct ones).

The product of its (nonzero) digits is 660602880, while the sum is 72.

The spelling of 868808487645 in words is "eight hundred sixty-eight billion, eight hundred eight million, four hundred eighty-seven thousand, six hundred forty-five".