868802161905 has 48 divisors (see below), whose sum is σ = 1508484978000. Its totient is φ = 462573600768.

The previous prime is 868802161883. The next prime is 868802161961. The reversal of 868802161905 is 509161208868.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 455774862321 + 413027299584 = 675111^2 + 642672^2 .

It is not a de Polignac number, because 868802161905 - 2⁶ = 868802161841 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 163644391 + ... + 163649699.

It is an arithmetic number, because the mean of its divisors is an integer number (31426770375).

Almost surely, 2^868802161905 is an apocalyptic number.

It is an amenable number.

868802161905 is a deficient number, since it is larger than the sum of its proper divisors (639682816095).

868802161905 is a wasteful number, since it uses less digits than its factorization.

868802161905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10818 (or 10815 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 868802161905 in words is "eight hundred sixty-eight billion, eight hundred two million, one hundred sixty-one thousand, nine hundred five".