840465000181 has 4 divisors (see below), whose sum is σ = 840466872000.
Its totient is φ = 840463128364.
The previous prime is 840465000173. The next prime is 840465000187. The reversal of 840465000181 is 181000564048.
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 840465000181 - 23 = 840465000173 is a prime.
It is a super-2 number, since 2×8404650001812 (a number of 25 digits) contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 840465000181.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (840465000187) 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, 185490 + ... + 1309708.
It is an arithmetic number, because the mean of its divisors is an integer number (210116718000).
It is a 449010-hyperperfect number.
Almost surely, 2840465000181 is an apocalyptic number.
It is an amenable number.
840465000181 is a deficient number, since it is larger than the sum of its proper divisors (1871819).
840465000181 is a wasteful number, since it uses less digits than its factorization.
840465000181 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1871818.
The product of its (nonzero) digits is 30720, while the sum is 37.
The spelling of 840465000181 in words is "eight hundred forty billion, four hundred sixty-five million, one hundred eighty-one", and thus it is an aban number.