9853378553477 has 2 divisors, whose sum is σ = 9853378553478. Its totient is φ = 9853378553476.

The previous prime is 9853378553443. The next prime is 9853378553509. The reversal of 9853378553477 is 7743558733589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9546314063521 + 307064489956 = 3089711^2 + 554134^2 .

It is a cyclic number.

It is not a de Polignac number, because 9853378553477 - 2³⁰ = 9852304811653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9853378556477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4926689276738 + 4926689276739.

It is an arithmetic number, because the mean of its divisors is an integer number (4926689276739).

Almost surely, 2^{9853378553477} is an apocalyptic number.

It is an amenable number.

9853378553477 is a deficient number, since it is larger than the sum of its proper divisors (1).

9853378553477 is an equidigital number, since it uses as much as digits as its factorization.

9853378553477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168000, while the sum is 74.

The spelling of 9853378553477 in words is "nine trillion, eight hundred fifty-three billion, three hundred seventy-eight million, five hundred fifty-three thousand, four hundred seventy-seven".