9853378556477 has 2 divisors, whose sum is σ = 9853378556478. Its totient is φ = 9853378556476.

The previous prime is 9853378556443. The next prime is 9853378556503. The reversal of 9853378556477 is 7746558733589.

9853378556477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5616454448836 + 4236924107641 = 2369906^2 + 2058379^2 .

It is a cyclic number.

It is not a de Polignac number, because 9853378556477 - 2²⁶ = 9853311447613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9853378556398 and 9853378556407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9853378553477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4926689278238 + 4926689278239.

It is an arithmetic number, because the mean of its divisors is an integer number (4926689278239).

Almost surely, 2^{9853378556477} is an apocalyptic number.

It is an amenable number.

9853378556477 is a deficient number, since it is larger than the sum of its proper divisors (1).

9853378556477 is an equidigital number, since it uses as much as digits as its factorization.

9853378556477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336000, while the sum is 77.

The spelling of 9853378556477 in words is "nine trillion, eight hundred fifty-three billion, three hundred seventy-eight million, five hundred fifty-six thousand, four hundred seventy-seven".