9978605441 has 6 divisors (see below), whose sum is σ = 11607765570. Its totient is φ = 8553090336.

The previous prime is 9978605431. The next prime is 9978605471. The reversal of 9978605441 is 1445068799.

It can be written as a sum of positive squares in only one way, i.e., 7621988416 + 2356617025 = 87304^2 + 48545^2 .

It is not a de Polignac number, because 9978605441 - 2¹⁴ = 9978589057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9978605401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101822456 + ... + 101822553.

It is an arithmetic number, because the mean of its divisors is an integer number (1934627595).

Almost surely, 2^9978605441 is an apocalyptic number.

It is an amenable number.

9978605441 is a deficient number, since it is larger than the sum of its proper divisors (1629160129).

9978605441 is a wasteful number, since it uses less digits than its factorization.

9978605441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203645023 (or 203645016 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 9978605441 is about 99892.9699278182. The cubic root of 9978605441 is about 2152.8971536767.

The spelling of 9978605441 in words is "nine billion, nine hundred seventy-eight million, six hundred five thousand, four hundred forty-one".