128224356697 has 2 divisors, whose sum is σ = 128224356698. Its totient is φ = 128224356696.

The previous prime is 128224356643. The next prime is 128224356731. The reversal of 128224356697 is 796653422821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65814823936 + 62409532761 = 256544^2 + 249819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128224356697 is a prime.

It is not a weakly prime, because it can be changed into another prime (128224356607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64112178348 + 64112178349.

It is an arithmetic number, because the mean of its divisors is an integer number (64112178349).

Almost surely, 2^128224356697 is an apocalyptic number.

It is an amenable number.

128224356697 is a deficient number, since it is larger than the sum of its proper divisors (1).

128224356697 is an equidigital number, since it uses as much as digits as its factorization.

128224356697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 55.

The spelling of 128224356697 in words is "one hundred twenty-eight billion, two hundred twenty-four million, three hundred fifty-six thousand, six hundred ninety-seven".