125265013889 has 4 divisors (see below), whose sum is σ = 125294169924. Its totient is φ = 125235857856.

The previous prime is 125265013877. The next prime is 125265013997. The reversal of 125265013889 is 988310562521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988310562521 = 49429 ⋅19994549.

It can be written as a sum of positive squares in 2 ways, for example, as 34899844225 + 90365169664 = 186815^2 + 300608^2 .

It is a cyclic number.

It is not a de Polignac number, because 125265013889 - 2²⁰ = 125263965313 is a prime.

It is a super-2 number, since 2×125265013889² (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 (125265019889) 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, 14571572 + ... + 14580165.

It is an arithmetic number, because the mean of its divisors is an integer number (31323542481).

Almost surely, 2^125265013889 is an apocalyptic number.

It is an amenable number.

125265013889 is a deficient number, since it is larger than the sum of its proper divisors (29156035).

125265013889 is an equidigital number, since it uses as much as digits as its factorization.

125265013889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29156034.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 125265013889 in words is "one hundred twenty-five billion, two hundred sixty-five million, thirteen thousand, eight hundred eighty-nine".