125344443521 has 16 divisors (see below), whose sum is σ = 137700753408. Its totient is φ = 113150494800.

The previous prime is 125344443461. The next prime is 125344443529.

125344443521 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 125344443521 - 2²⁶ = 125277334657 is a prime.

It is a super-2 number, since 2×125344443521² (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 (125344443529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129880 + ... + 1235846.

It is an arithmetic number, because the mean of its divisors is an integer number (8606297088).

Almost surely, 2^125344443521 is an apocalyptic number.

125344443521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125344443521 is a deficient number, since it is larger than the sum of its proper divisors (12356309887).

125344443521 is a wasteful number, since it uses less digits than its factorization.

125344443521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106732.

The product of its digits is 230400, while the sum is 38.

It can be divided in two parts, 125344 and 443521, that added together give a palindrome (568865).

The spelling of 125344443521 in words is "one hundred twenty-five billion, three hundred forty-four million, four hundred forty-three thousand, five hundred twenty-one".