125855359697 has 2 divisors, whose sum is σ = 125855359698. Its totient is φ = 125855359696.

The previous prime is 125855359649. The next prime is 125855359711. The reversal of 125855359697 is 796953558521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124242855361 + 1612504336 = 352481^2 + 40156^2 .

It is an emirp because it is prime and its reverse (796953558521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125855359697 is a prime.

It is a super-2 number, since 2×125855359697² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125855359627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62927679848 + 62927679849.

It is an arithmetic number, because the mean of its divisors is an integer number (62927679849).

Almost surely, 2^125855359697 is an apocalyptic number.

It is an amenable number.

125855359697 is a deficient number, since it is larger than the sum of its proper divisors (1).

125855359697 is an equidigital number, since it uses as much as digits as its factorization.

125855359697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060000, while the sum is 65.

The spelling of 125855359697 in words is "one hundred twenty-five billion, eight hundred fifty-five million, three hundred fifty-nine thousand, six hundred ninety-seven".