128144581577 has 2 divisors, whose sum is σ = 128144581578. Its totient is φ = 128144581576.

The previous prime is 128144581541. The next prime is 128144581661. The reversal of 128144581577 is 775185441821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66308310016 + 61836271561 = 257504^2 + 248669^2 .

It is a cyclic number.

It is not a de Polignac number, because 128144581577 - 2¹⁴ = 128144565193 is a prime.

It is not a weakly prime, because it can be changed into another prime (128144581507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64072290788 + 64072290789.

It is an arithmetic number, because the mean of its divisors is an integer number (64072290789).

Almost surely, 2^128144581577 is an apocalyptic number.

It is an amenable number.

128144581577 is a deficient number, since it is larger than the sum of its proper divisors (1).

128144581577 is an equidigital number, since it uses as much as digits as its factorization.

128144581577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2508800, while the sum is 53.

The spelling of 128144581577 in words is "one hundred twenty-eight billion, one hundred forty-four million, five hundred eighty-one thousand, five hundred seventy-seven".