68161810885 has 48 divisors (see below), whose sum is σ = 101968903296. Its totient is φ = 43498933632.

The previous prime is 68161810861. The next prime is 68161810891. The reversal of 68161810885 is 58801816186.

It is a happy number.

It is not a de Polignac number, because 68161810885 - 2⁵ = 68161810853 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45034 + ... + 371956.

It is an arithmetic number, because the mean of its divisors is an integer number (2124352152).

Almost surely, 2^68161810885 is an apocalyptic number.

It is an amenable number.

68161810885 is a deficient number, since it is larger than the sum of its proper divisors (33807092411).

68161810885 is a wasteful number, since it uses less digits than its factorization.

68161810885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327002 (or 326995 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 52.

The spelling of 68161810885 in words is "sixty-eight billion, one hundred sixty-one million, eight hundred ten thousand, eight hundred eighty-five".