68020587161 has 4 divisors (see below), whose sum is σ = 68342959824. Its totient is φ = 67698214500.

The previous prime is 68020587149. The next prime is 68020587163. The reversal of 68020587161 is 16178502086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68020587161 - 2³⁰ = 66946845337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68020587163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161186015 + ... + 161186436.

It is an arithmetic number, because the mean of its divisors is an integer number (17085739956).

Almost surely, 2^68020587161 is an apocalyptic number.

It is an amenable number.

68020587161 is a deficient number, since it is larger than the sum of its proper divisors (322372663).

68020587161 is a wasteful number, since it uses less digits than its factorization.

68020587161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322372662.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 68020587161 in words is "sixty-eight billion, twenty million, five hundred eighty-seven thousand, one hundred sixty-one".