125992169889 has 16 divisors (see below), whose sum is σ = 168367809600. Its totient is φ = 83805751616.

The previous prime is 125992169869. The next prime is 125992169899. The reversal of 125992169889 is 988961299521.

It is a cyclic number.

It is not a de Polignac number, because 125992169889 - 2¹⁹ = 125991645601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125992169869) 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, 6493807 + ... + 6513179.

It is an arithmetic number, because the mean of its divisors is an integer number (10522988100).

Almost surely, 2^125992169889 is an apocalyptic number.

It is an amenable number.

125992169889 is a deficient number, since it is larger than the sum of its proper divisors (42375639711).

125992169889 is a wasteful number, since it uses less digits than its factorization.

125992169889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24144.

The product of its digits is 50388480, while the sum is 69.

The spelling of 125992169889 in words is "one hundred twenty-five billion, nine hundred ninety-two million, one hundred sixty-nine thousand, eight hundred eighty-nine".