125446981169 has 4 divisors (see below), whose sum is σ = 127813905396. Its totient is φ = 123080056944.

The previous prime is 125446981109. The next prime is 125446981183. The reversal of 125446981169 is 961189644521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42802230769 + 82644750400 = 206887^2 + 287480^2 .

It is a cyclic number.

It is not a de Polignac number, because 125446981169 - 2²⁴ = 125430203953 is a prime.

It is a super-2 number, since 2×125446981169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125446981109) 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 in 3 ways as a sum of consecutive naturals, for example, 1183462034 + ... + 1183462139.

It is an arithmetic number, because the mean of its divisors is an integer number (31953476349).

Almost surely, 2^125446981169 is an apocalyptic number.

It is an amenable number.

125446981169 is a deficient number, since it is larger than the sum of its proper divisors (2366924227).

125446981169 is an equidigital number, since it uses as much as digits as its factorization.

125446981169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366924226.

The product of its digits is 3732480, while the sum is 56.

The spelling of 125446981169 in words is "one hundred twenty-five billion, four hundred forty-six million, nine hundred eighty-one thousand, one hundred sixty-nine".