402068161 has 4 divisors (see below), whose sum is σ = 438619824. Its totient is φ = 365516500.

The previous prime is 402068111. The next prime is 402068167. The reversal of 402068161 is 161860204.

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 a de Polignac number, because none of the positive numbers 2^k-402068161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402068167) 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, 18275815 + ... + 18275836.

It is an arithmetic number, because the mean of its divisors is an integer number (109654956).

Almost surely, 2^402068161 is an apocalyptic number.

It is an amenable number.

402068161 is a deficient number, since it is larger than the sum of its proper divisors (36551663).

402068161 is a wasteful number, since it uses less digits than its factorization.

402068161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36551662.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 402068161 is about 20051.6373645645. The cubic root of 402068161 is about 738.0739791390.

The spelling of 402068161 in words is "four hundred two million, sixty-eight thousand, one hundred sixty-one".