125163065735251 has 4 divisors (see below), whose sum is σ = 125854574385904. Its totient is φ = 124471557084600.

The previous prime is 125163065735237. The next prime is 125163065735261. The reversal of 125163065735251 is 152537560361521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125163065735251 - 2¹¹ = 125163065733203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125163065735261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345754325055 + ... + 345754325416.

It is an arithmetic number, because the mean of its divisors is an integer number (31463643596476).

Almost surely, 2^{125163065735251} is an apocalyptic number.

125163065735251 is a deficient number, since it is larger than the sum of its proper divisors (691508650653).

125163065735251 is an equidigital number, since it uses as much as digits as its factorization.

125163065735251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691508650652.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 125163065735251 in words is "one hundred twenty-five trillion, one hundred sixty-three billion, sixty-five million, seven hundred thirty-five thousand, two hundred fifty-one".