128725368799 has 2 divisors, whose sum is σ = 128725368800. Its totient is φ = 128725368798.

The previous prime is 128725368757. The next prime is 128725368859. The reversal of 128725368799 is 997863527821.

It is a weak prime.

It is an emirp because it is prime and its reverse (997863527821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128725368799 - 2¹⁷ = 128725237727 is a prime.

It is a super-4 number, since 4×128725368799⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128725368199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64362684399 + 64362684400.

It is an arithmetic number, because the mean of its divisors is an integer number (64362684400).

Almost surely, 2^128725368799 is an apocalyptic number.

128725368799 is a deficient number, since it is larger than the sum of its proper divisors (1).

128725368799 is an equidigital number, since it uses as much as digits as its factorization.

128725368799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 67.

The spelling of 128725368799 in words is "one hundred twenty-eight billion, seven hundred twenty-five million, three hundred sixty-eight thousand, seven hundred ninety-nine".