42864986161 has 4 divisors (see below), whose sum is σ = 42865408512. Its totient is φ = 42864563812.

The previous prime is 42864986083. The next prime is 42864986191. The reversal of 42864986161 is 16168946824.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42864986161 - 2²⁷ = 42730768433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42864986191) 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, 43200 + ... + 295966.

It is an arithmetic number, because the mean of its divisors is an integer number (10716352128).

Almost surely, 2^42864986161 is an apocalyptic number.

It is an amenable number.

42864986161 is a deficient number, since it is larger than the sum of its proper divisors (422351).

42864986161 is a wasteful number, since it uses less digits than its factorization.

42864986161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422350.

The product of its digits is 3981312, while the sum is 55.

The spelling of 42864986161 in words is "forty-two billion, eight hundred sixty-four million, nine hundred eighty-six thousand, one hundred sixty-one".