125923689569 has 16 divisors (see below), whose sum is σ = 135069250176. Its totient is φ = 116981280000.

The previous prime is 125923689559. The next prime is 125923689583. The reversal of 125923689569 is 965986329521.

It is a cyclic number.

It is not a de Polignac number, because 125923689569 - 2⁴ = 125923689553 is a prime.

It is a super-2 number, since 2×125923689569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125923689559) 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, 246794 + ... + 559244.

It is an arithmetic number, because the mean of its divisors is an integer number (8441828136).

Almost surely, 2^125923689569 is an apocalyptic number.

It is an amenable number.

125923689569 is a deficient number, since it is larger than the sum of its proper divisors (9145560607).

125923689569 is a wasteful number, since it uses less digits than its factorization.

125923689569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312776.

The product of its digits is 62985600, while the sum is 65.

The spelling of 125923689569 in words is "one hundred twenty-five billion, nine hundred twenty-three million, six hundred eighty-nine thousand, five hundred sixty-nine".