125196505569 has 12 divisors (see below), whose sum is σ = 180843943956. Its totient is φ = 83462238432.

The previous prime is 125196505561. The next prime is 125196505619. The reversal of 125196505569 is 965505691521.

125196505569 is a `hidden beast` number, since 1 + 2 + 5 + 19 + 65 + 0 + 5 + 569 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20649690000 + 104546815569 = 143700^2 + 323337^2 .

It is not a de Polignac number, because 125196505569 - 2³ = 125196505561 is a prime.

It is a super-2 number, since 2×125196505569² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125196505561) 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 11 ways as a sum of consecutive naturals, for example, 259807 + ... + 563819.

It is an arithmetic number, because the mean of its divisors is an integer number (15070328663).

Almost surely, 2^125196505569 is an apocalyptic number.

It is an amenable number.

125196505569 is a deficient number, since it is larger than the sum of its proper divisors (55647438387).

125196505569 is a wasteful number, since it uses less digits than its factorization.

125196505569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349776 (or 349773 counting only the distinct ones).

The product of its (nonzero) digits is 3645000, while the sum is 54.

The spelling of 125196505569 in words is "one hundred twenty-five billion, one hundred ninety-six million, five hundred five thousand, five hundred sixty-nine".