128945053477 has 2 divisors, whose sum is σ = 128945053478. Its totient is φ = 128945053476.

The previous prime is 128945053427. The next prime is 128945053487. The reversal of 128945053477 is 774350549821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90306861121 + 38638192356 = 300511^2 + 196566^2 .

It is a cyclic number.

It is not a de Polignac number, because 128945053477 - 2¹⁵ = 128945020709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128945053417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64472526738 + 64472526739.

It is an arithmetic number, because the mean of its divisors is an integer number (64472526739).

Almost surely, 2^128945053477 is an apocalyptic number.

It is an amenable number.

128945053477 is a deficient number, since it is larger than the sum of its proper divisors (1).

128945053477 is an equidigital number, since it uses as much as digits as its factorization.

128945053477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 128945053477 in words is "one hundred twenty-eight billion, nine hundred forty-five million, fifty-three thousand, four hundred seventy-seven".