125967685209 has 4 divisors (see below), whose sum is σ = 167956913616. Its totient is φ = 83978456804.

The previous prime is 125967685201. The next prime is 125967685223. The reversal of 125967685209 is 902586769521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125967685209 - 2³ = 125967685201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125967685201) 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, 20994614199 + ... + 20994614204.

It is an arithmetic number, because the mean of its divisors is an integer number (41989228404).

Almost surely, 2^125967685209 is an apocalyptic number.

It is an amenable number.

125967685209 is a deficient number, since it is larger than the sum of its proper divisors (41989228407).

125967685209 is an equidigital number, since it uses as much as digits as its factorization.

125967685209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41989228406.

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 125967685209 in words is "one hundred twenty-five billion, nine hundred sixty-seven million, six hundred eighty-five thousand, two hundred nine".