9978448605 has 16 divisors (see below), whose sum is σ = 16904666304. Its totient is φ = 5008789760.

The previous prime is 9978448589. The next prime is 9978448607. The reversal of 9978448605 is 5068448799.

It is not a de Polignac number, because 9978448605 - 2⁴ = 9978448589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978448607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19565331 + ... + 19565840.

It is an arithmetic number, because the mean of its divisors is an integer number (1056541644).

Almost surely, 2^9978448605 is an apocalyptic number.

It is an amenable number.

9978448605 is a deficient number, since it is larger than the sum of its proper divisors (6926217699).

9978448605 is a wasteful number, since it uses less digits than its factorization.

9978448605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39131196.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The square root of 9978448605 is about 99892.1849045259. The cubic root of 9978448605 is about 2152.8858744270.

The spelling of 9978448605 in words is "nine billion, nine hundred seventy-eight million, four hundred forty-eight thousand, six hundred five".