844890961165 has 4 divisors (see below), whose sum is σ = 1013869153404. Its totient is φ = 675912768928.

The previous prime is 844890961153. The next prime is 844890961177. The reversal of 844890961165 is 561169098448.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (844890961153) and next prime (844890961177).

It can be written as a sum of positive squares in 2 ways, for example, as 387896032969 + 456994928196 = 622813^2 + 676014^2 .

It is a cyclic number.

It is not a de Polignac number, because 844890961165 - 2¹³ = 844890952973 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 84489096112 + ... + 84489096121.

It is an arithmetic number, because the mean of its divisors is an integer number (253467288351).

Almost surely, 2^844890961165 is an apocalyptic number.

It is an amenable number.

844890961165 is a deficient number, since it is larger than the sum of its proper divisors (168978192239).

844890961165 is a wasteful number, since it uses less digits than its factorization.

844890961165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168978192238.

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 844890961165 in words is "eight hundred forty-four billion, eight hundred ninety million, nine hundred sixty-one thousand, one hundred sixty-five".