128245784591 has 2 divisors, whose sum is σ = 128245784592. Its totient is φ = 128245784590.

The previous prime is 128245784551. The next prime is 128245784609. The reversal of 128245784591 is 195487542821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128245784591 - 2³⁴ = 111065915407 is a prime.

It is a super-2 number, since 2×128245784591² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128245784531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64122892295 + 64122892296.

It is an arithmetic number, because the mean of its divisors is an integer number (64122892296).

Almost surely, 2^128245784591 is an apocalyptic number.

128245784591 is a deficient number, since it is larger than the sum of its proper divisors (1).

128245784591 is an equidigital number, since it uses as much as digits as its factorization.

128245784591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6451200, while the sum is 56.

The spelling of 128245784591 in words is "one hundred twenty-eight billion, two hundred forty-five million, seven hundred eighty-four thousand, five hundred ninety-one".