978449764223 has 8 divisors (see below), whose sum is σ = 987215262000. Its totient is φ = 969686137728.

The previous prime is 978449764217. The next prime is 978449764249. The reversal of 978449764223 is 322467944879.

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

It is a cyclic number.

It is not a de Polignac number, because 978449764223 - 2²⁶ = 978382655359 is a prime.

It is a super-2 number, since 2×978449764223² (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 978449764223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978449764273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593348 + ... + 1519526.

It is an arithmetic number, because the mean of its divisors is an integer number (123401907750).

Almost surely, 2^978449764223 is an apocalyptic number.

978449764223 is a deficient number, since it is larger than the sum of its proper divisors (8765497777).

978449764223 is a wasteful number, since it uses less digits than its factorization.

978449764223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935641.

The product of its digits is 146313216, while the sum is 65.

The spelling of 978449764223 in words is "nine hundred seventy-eight billion, four hundred forty-nine million, seven hundred sixty-four thousand, two hundred twenty-three".