125013888889 has 4 divisors (see below), whose sum is σ = 125704573540. Its totient is φ = 124323204240.

The previous prime is 125013888871. The next prime is 125013888911. The reversal of 125013888889 is 988888310521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988888310521 = 121621 ⋅8130901.

It can be written as a sum of positive squares in 2 ways, for example, as 19264052025 + 105749836864 = 138795^2 + 325192^2 .

It is a cyclic number.

It is not a de Polignac number, because 125013888889 - 2⁷ = 125013888761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125013888869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345342054 + ... + 345342415.

It is an arithmetic number, because the mean of its divisors is an integer number (31426143385).

Almost surely, 2^125013888889 is an apocalyptic number.

It is an amenable number.

125013888889 is a deficient number, since it is larger than the sum of its proper divisors (690684651).

125013888889 is an equidigital number, since it uses as much as digits as its factorization.

125013888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690684650.

The product of its (nonzero) digits is 8847360, while the sum is 61.

The spelling of 125013888889 in words is "one hundred twenty-five billion, thirteen million, eight hundred eighty-eight thousand, eight hundred eighty-nine".