869219853449 has 8 divisors (see below), whose sum is σ = 878226384168. Its totient is φ = 860214251520.

The previous prime is 869219853419. The next prime is 869219853457. The reversal of 869219853449 is 944358912968.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74925375625 + 794294477824 = 273725^2 + 891232^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 869219853449 - 2¹² = 869219849353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869219853419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735109 + ... + 2179229.

It is an arithmetic number, because the mean of its divisors is an integer number (109778298021).

Almost surely, 2^869219853449 is an apocalyptic number.

It is an amenable number.

869219853449 is a deficient number, since it is larger than the sum of its proper divisors (9006530719).

869219853449 is a wasteful number, since it uses less digits than its factorization.

869219853449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464395.

The product of its digits is 134369280, while the sum is 68.

The spelling of 869219853449 in words is "eight hundred sixty-nine billion, two hundred nineteen million, eight hundred fifty-three thousand, four hundred forty-nine".