219378044590849 has 4 divisors (see below), whose sum is σ = 219379102546500. Its totient is φ = 219376986635200.

The previous prime is 219378044590829. The next prime is 219378044590867. The reversal of 219378044590849 is 948095440873912.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60420415125249 + 158957629465600 = 7773057^2 + 12607840^2 .

It is a cyclic number.

It is not a de Polignac number, because 219378044590849 - 2⁹ = 219378044590337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219378044590829) 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, 528666724 + ... + 529081525.

It is an arithmetic number, because the mean of its divisors is an integer number (54844775636625).

Almost surely, 2^{219378044590849} is an apocalyptic number.

It is an amenable number.

219378044590849 is a deficient number, since it is larger than the sum of its proper divisors (1057955651).

219378044590849 is a wasteful number, since it uses less digits than its factorization.

219378044590849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057955650.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 219378044590849 in words is "two hundred nineteen trillion, three hundred seventy-eight billion, forty-four million, five hundred ninety thousand, eight hundred forty-nine".